text:
On the odd occasion, usually after incorrectly restarting my computer, my login screen resolution is not the default 1440x900, but I think 1600x900. Now, I have this monitor that's really bad at handling resolutions it's not designed to handle, and will show a silly "wrong resolution" box jumping around the screen.

Is there any way to make the login screen load a 1440x900 resolution no matter what? I'm running Ubuntu 11.10 with Unity and LightDM.

You can make a script for this (source LightDM Resolution).

1. Firstly we need to find out what your monitors identifier is. Open up a terminal, start typing terminal in your unity dash to see the option or press Ctrl+Alt+T
2. Type/copy this command to show your display details:

xrandr -q

If you only have one monitor you will see a line in the output like the following (probably with some different values, its the identifier at the start we are after):

DVI-0 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 473mm x 296mm

The screen identifier is DVI-0 in this case

3. Open up your favourite text editor, lets use gedit for this example, press Alt+F2 and type gedit

4. Type/copy this in:

#!/bin/sh
xrandr --output DVI-0 --primary --mode 1440x900

Save this on your desktop as lightdmxrandr.sh

5. You may want to test the script before we put it into practice. Back in the terminal navigate to where we just saved it:

cd ~/Desktop

Now we need to make it executable:

chmod a+rx lightdmxrandr.sh

Now run it:

./lightdmxrandr.sh

(If your screen automatically auto-corrects after log in you probably won't see a difference so you may want to use a test resolution that is different but you know works while testing)

6. Now lets move the little script we made:

sudo mv ~/Desktop/lightdmxrandr.sh /usr/share/.

If you don't use sudo you may get a permission error (I use this folder out of personal preference)

7. We need to now run this in lightdm, navigate to the correct folder:

cd /etc/lightdm

8. Open up the lightdm conf file:

sudo gedit lightdm.conf

9. Now add the the instruction to run your script after the last line and save:

display-setup-script=/usr/share/lightdmxrandr.sh

(these instructions might look long but they don't take long at all)

• Thanks! I use Leon's script mentioned below. askubuntu.com/a/88882/28071 – beanaroo Mar 2 '12 at 13:21
• That's a nice script, think I'll store that for future use! – captain_G Mar 2 '12 at 21:07
• Unfortunately this just breaks things in Ubuntu 13.04. Probably because they have been making some massive changes to the OS. – Patrick Sep 23 '13 at 15:24
• Also doesn't work with Ubuntu 13.10 + NVIDIA driver 319: The script is executed but the resolution doesn't change - probably because the NVIDIA driver overrides it. – speakr Nov 5 '13 at 8:12
• I think it should be chown root:root also? – Aquarius Power Oct 12 '14 at 19:38

I found a very simple workaround that works perfectly for me running 13.04. (update: now 13.10) on a laptop with a 24" external screen that is not permanently connected.

I'll just copy from here

2. use xrandr or the Displays control utility to configure your monitors how you'd like them to be configured in the login screen
3. copy ~/.config/monitors.xml to /var/lib/lightdm/.config

Some other answers given here worked for me but only in a specific scenario while running risk of an unusable system in other scenarios (LOW GRAPHICS MODE ERROR). For example with the external monitor permanently connected (accepted answer by @captain_G) or with always the same device connected to the output used for the external monitor (script by @Axlrod). It seems that @MarcoV's answer is the most generic solution, however it does still involve scripting rules.

• Much simpler than the other answers... I wonder why it doesn't have more votes. Well, it has mine. – aap Oct 27 '13 at 14:28
• Then again, although it does help the login screen, it would be nice if other users didn't have to set up the display resolution again. – aap Oct 27 '13 at 18:41
• Rather than copying the file, create a link to it so that it's automatically updated whenever you change your screen settings: $sudo ln ~/.config/monitors.xml /var/lib/lightdm/.config/monitors.xml (No, symbolic links DO NOT work.) – Nathan J.B. Jan 26 '15 at 20:32 • Which application writes/updates monitors.xml? I'm using XFCE and this file is 2 years old and completely outdated. I can't find a similar file. – scai Oct 15 '15 at 14:24 • This is the correct approach as opposed to creating a script to change resolutions. .config/monitors.xml can support multiple monitor configuration (i.e. your setup at work with a dock and 2 monitors vs your setup at home with no dock and 1 external monitor). Creating a manual script to set the resolution would be relatively more complex to do.| – Iyad K Dec 20 '18 at 13:20 You can instead of creating script, just add to file /etc/lightdm/lightdm.conf a line like this: display-setup-script=xrandr --output default --mode 1280x720  Before inserting make sure that command works, because with wrong command, lightdm will not start. • Hi, your xrand commands says : warning: output default not found; ignoring – SebMa Apr 27 '18 at 13:29 • @SebMa You have to use the correct output name! – Ken Sharp Jul 5 '18 at 15:59 For a multi monitor setup where you might disconnect your laptop and use without, here is a simple solution: run: xrandr  Get the devices you are using laptop is usually LVDS1, and for me I have a DP2 (displayport 2) it could be HDMI1 or anything else, just find the ones with resolutions listed next to them. Create this small bash file: #!/bin/bash mode="$(xrandr -q|grep -A1 "DP2 connected"| tail -1 |awk '{ print $1 }')" if [ -n "$mode" ]; then
xrandr --output LVDS1 --off
xrandr --output DP2 --primary --mode 2540x1440
fi

Replace LVDS1 with your laptop monitor connection.

Replace DP2 with your external monitor connection.

Place bash script in /usr/bin/local/

chmod +x the script

edit /etc/lightdm/lightdm.conf

display-setup-script=/path/to/my/script

Reboot.

The resolution change will only happen when you are actually at that display now.

If you have multiple places with different monitors / resolutions on same connector you will have to put more intelligence in your bash script.

Just little bit improved the above Axlrod's script.

All you need to do is specify which monitor to use primary, and which is your laptop display(LVDS).

#!/bin/bash
LVDS="LVDS-0"
PRIMARY="VGA-0"

function get_displays()
{
xrandr -q | grep connected | awk '{print $1}' } function get_resolution() { [[ -z "$1" ]] && return 0 || xrandr -q | grep -A1 $1 | tail -1 | awk '{print$1}' | grep -e "^[0-9]"
}

for display in $(get_displays); do resolution=get_resolution$display

[[ $display ==$PRIMARY ]] && arg="--primary";
[[ -n $resolution ]] && mode="--mode$resolution";

if [[ $display ==$LVDS ]]; then
xrandr --output $display --off elif [[ -n$mode ]]; then
xrandr --output $display$arg $mode fi unset mode arg resolution; done  sudo gedit /usr/share/X11/xorg.conf.d/52-myres.conf  then in the file: Section "Monitor" Identifier "VGA1" Option "PreferredMode" "1152x864" EndSection  Save and exit. The values were obtained from command xrandr -q. VGA1 is the name of my connector and 1152x864 is the name of the resolution. This works for Xubuntu 16.04. It sets a preferred resolution and for me it let me set the resolution of the login screen, instead of having it default to the highest resolution supported. Modified from answers here • After install open-vm-tools and open-vm-tools-desktop, copying monitors.xml to /var/lib/lightdm/.config was no longer working for me. Specifying the preferred resolution like this fixed it for me. – jropella Jul 30 '17 at 6:32 What I've found to be useful was a post on the Ubuntu guide website . I tried so many things in Ubuntu 11.10 and even tried to use simply GNOME Classic. The resolution was always 1024x768 and when I manually set it to 1440x900 it was "virtual", I mean I had to scroll with the mouse to explore the entire desktop that was beyond the real screen dimensions. In the Terminal I ran this command: sudo gedit /etc/default/grub  The text editor can take a while to load. Once it loaded, I edited the line GRUB_GFXMODE=1024x768  and changed it to: GRUB_GFXMODE=1440x900  Remember to run update-grub to apply the changes. After that I tried to reinstall VESA drivers (in this computer I have a GeForce 260 GTX). I know that the better way is to use Nvidia official drivers, but using them the problem was always the same... Sure, I think, now performance will be worse. So, checking Nvidia X Server Settings panel I verified that my resolution was added and, switching to it, it made the screen in the right look. Actually I'm using Ubuntu 11.10 but in GNOME Classic. I'm a newbie of Linux so hope I've written decent things. Don't muck with scripts or configuration files that have the possibility of rendering your login screen unusable! Instead, login and set your preferred screen settings*, then run this command: sudo ln ~/.config/monitors.xml /var/lib/lightdm/.config/monitors.xml  Your login resolution will now always reflect the settings of the user you're currently signed into. *Don't forget to click "Apply" • This works but it is secondary. It does a normal load in the max resolution and then switches to your settings. How can you make it load the correct resolution to start? – Goddard Dec 4 '15 at 3:58 Axelrod's script is somewhat defective, as a grep for 'connected' grabs all the 'disconnected' displays too...not what we want... Moreover, using grep with awk and tail, etc...is wastefully circuitous, and I'd suggest as follows hereupon. Additionally, in get_resolution we change the return code to 1, since a return code of zero is usually indicative of a lack of errors, thus we use 1 if the first parameter is absent. In conclusion, by instantiating the main part of the script a function, it can be sourced in and executed at any further time if need be in a function library as well as gaining the usage of local variables, which do not need to be unset. function get_displays() { xrandr -q | awk '($2 == "connected") {print $1;}' }; # the "\" and c/r were added for readability on this website # I do not have them in my code variant that I use. function get_resolution() { [[ -z "$1" ]] && return 1;
xrandr -q | \
awk -v display="$1" '($1 == display && $2 == "connected") {getline; print$1;}';
};

function setup_displays()
{
local   primary=${2:-"VGA-0"}; local lvds=${3:-"LVDS-0"};

for display in $(get_displays); do local resolution=${1:-"$(get_resolution$display)"};

[[ $display ==$primary ]] && local arg="--primary";
[[ -n $resolution ]] && local mode="--mode$resolution";

if [[ $display ==$lvds ]];
then
xrandr --output $display --off; elif [[ -n$mode ]];
then
xrandr --output $display$arg \$mode;
fi;
done;
};

setup_displays;

This is how I got it working in Xubuntu 16.04.

You need to obtain along string for the desired resolution. This is within the result of the command:

xrandr --verbose

Now pick the part with the resolution you want. It will look something like:

1152x864 (0xa6) 108.000MHz +HSync +VSync
h: width  1152 start 1216 end 1344 total 1600 skew    0 clock  67.50KHz
v: height  864 start  865 end  868 total  900           clock  75.00Hz

From the data above you should get the string 108.000 1152 1216 1344 1600 864 865 868 900 +HSync +VSync.

To find the name of your output, find a line similar too:

VGA1 connected 1152x864+0+0 (0xa4) normal (normal left inverted right x axis y axis) 306mm x 230mm

Here my output is named VGA1.

Now create script:

sudo gedit /usr/share/lightdmxrandr.sh

Then in the file write the following:

#!/bin/sh
xrandr --newmode "1152x864_75.00"  108.000  1152 1216 1344 1600  864 865 868 900 +HSync +VSync
xrandr --output VGA1 --mode 1152x864_75.00 --pos 0x0 --rotate normal

Save and close file. Make script executable:

sudo chmod a+rx /usr/share/lightdmxrandr.sh

Create a config file to call the script just created.

sudo gedit /etc/lightdm/lightdm.conf.d/00-myres.conf

inside this file enter:

[Seat:*]
display-setup-script=/usr/share/lightdmxrandr.sh

Save and close file. Restart and hopefully the resolution you chose will be at your login.

In practical terms this is the only way that worked for me, even though re-creating existing resolutions is not logical.

note

An alternative way to get the long resolution string is the program cvt. To get a string for resolution 1152x864, refresh rate 75.00:

cvt 1152 864 75

This gave me a slightly different resolution than my desktop resolution, and is the reason I did not include the method in the main answer.

If you're using LightDM's GTK greeter then you can run xrandr -q to find the names of your monitors then edit /etc/lightdm/lightdm-gtk-greeter and set the property active-monitor as described in the comments inside that file. This property can take multiple, ordered values including #cursor for the monitor that currently shows the mouse cursor.

i like to attach my script that configures the monitors to one of the multimedia keys on my keyboard that i don't otherwise use. currently i have the button labeled 'windows media center' force my displays into their preferred configuration. this way if you are flying blind and your monitors aren't syncing to the desired resolution, just mash the hot key and all is fixed.

“Preferred Screen Modes” might be the Problem

I assume that your monitor reports the high screen resolution as being preferred. Now you would like to override this default preference. See my answer to a very similar question for details on how this can be done.

I had the opposite problem: I always got a lower screen resolution (1280x1024) than the one I wanted (1600x1200). The fix I have found (and described in the linked answer) will hopefully be applicable analogously to your problem, though.

• Whoever voted my answer down, could you please add a note on why you think this answer is not useful? – Chriki Oct 4 '16 at 10:43

I had the same problem on my MacBook Pro mid-2014 (11,1) running Xenial. I have tried all the aforementioned solutions in various forms, but invariably would get X going into failsafe low-graphics mode (but displayed in the very resolution I wanted it to set as default no less.

After much wrangling over the forums and googling, turns out that I had forgotten the simplest and default potential solution: nomodeset. That fixed the problem.

TL;DR: Don't forget to try nomodeset! Esp. on a MacbookPro 11,1.

I've created this script to make it more dynamic (multiple workspaces / different monitors).

Only annoyance: when you log in from lightdm, the screen still flashes like it wants to change resolution :s

• Paste was not found. – Tobold Aug 13 '13 at 8:13
• Indeed; if you still have a local copy of the script please consider re-uploading it. – wchargin Sep 25 '13 at 13:18
• I've uploaded the script to github. I don't know why paste.ubuntu.com removed it :( – Leon Dec 8 '13 at 20:24


text:
# zbMATH — the first resource for mathematics

##### Examples
 Geometry Search for the term Geometry in any field. Queries are case-independent. Funct* Wildcard queries are specified by * (e.g. functions, functorial, etc.). Otherwise the search is exact. "Topological group" Phrases (multi-words) should be set in "straight quotation marks". au: Bourbaki & ti: Algebra Search for author and title. The and-operator & is default and can be omitted. Chebyshev | Tschebyscheff The or-operator | allows to search for Chebyshev or Tschebyscheff. "Quasi* map*" py: 1989 The resulting documents have publication year 1989. so: Eur* J* Mat* Soc* cc: 14 Search for publications in a particular source with a Mathematics Subject Classification code (cc) in 14. "Partial diff* eq*" ! elliptic The not-operator ! eliminates all results containing the word elliptic. dt: b & au: Hilbert The document type is set to books; alternatively: j for journal articles, a for book articles. py: 2000-2015 cc: (94A | 11T) Number ranges are accepted. Terms can be grouped within (parentheses). la: chinese Find documents in a given language. ISO 639-1 language codes can also be used.

##### Operators
 a & b logic and a | b logic or !ab logic not abc* right wildcard "ab c" phrase (ab c) parentheses
##### Fields
 any anywhere an internal document identifier au author, editor ai internal author identifier ti title la language so source ab review, abstract py publication year rv reviewer cc MSC code ut uncontrolled term dt document type (j: journal article; b: book; a: book article)
Natural convection in shallow water. (English) Zbl 1129.76049
Summary: Starting from three-dimensional Boussinesq model and taking the limit as the domain thickness tends to zero, we derive rigorously a two-dimensional model for natural convection in shallow water. The model reduces to a degenerate elliptic equation for pressure, and allows to derive an explicit formula for horizontal components of velocity and for the vertical diffusion of the vertical component. The macroscopic flow is driven by temperature variations as well as by the bottom topography.

##### MSC:
 76R10 Free convection (fluid mechanics) 80A20 Heat and mass transfer, heat flow 86A05 Hydrology, hydrography, oceanography
##### Keywords:
Boussinesq model; elliptic equation; vertical diffusion
Full Text:
##### References:
 [1] Batchelor, G. K.: An introduction to fluid mechanics. (1970) [2] Bernardi, C.; Métivet, B.; Pernaud-Thomas, B.: Couplage des équations de Navier -- Stokes et de la chaleur: le modèle et son approximation par éléments finis. RAIRO modél. Math. anal. Numér. 29, 871-921 (1995) · Zbl 0839.76016 [3] Boussinesq, J.: Théorie analytique de la chaleur. (1903) · Zbl 34.0887.05 [4] D. Brech, J. Lemoine, J. Simon, A vertical diffusion model for lakes, SIAM J. Math. Anal. 30 (3) 603 -- 622. · Zbl 0930.35120 [5] Brech, D.; Lemoine, J.; Simon, J.: Modelization of shallow lakes and seas. Proceedings of STAMM 98, Chapman and Hall monographs and surveys in pure and applied mathematics 106, 260-271 (2000) · Zbl 1100.86500 [6] Jacobs, A. F. G.; Jetten, T. H.; Lucassen, D. C.; Heuskinveld, B.; Nieveen, J. P.: Daily temperature variation in a natural shallow water body. Agric. forest meteorol. 88, 269-277 (1997) [7] L. Landau, E. Lifchitz, Mécanique des fluides, Elipses, 3ème édition, 1994. [8] Losordo, T. M.; Piedrahita, R. H.: Modelling temperature variation and thermal stratification in shallow aquaculture ponds. Ecological modelling 54, 189-226 (1991) [9] A. Majda, Introduction to PDEs and Waves for the Atmosphere and Ocean, Courant Lecture Notes, vol. 9, American Mathematical Society, Providence, RI, 2003. · Zbl 1278.76004 [10] Marušić, S.; Marušić-Paloka, E.: Two-scale convergence for thin domains and its applications to some lower-dimensional models in fluid mechanics. Asymptotic anal. 23, 23-58 (2000) [11] Marušić-Paloka, E.: Solvability of the Navier -- Stokes system with L2 boundary data. Appl. math. Optim. 41, 365-375 (2000) · Zbl 0952.35090 [12] Da Rocha, M. Santos; Rojas-Medar, M. A.; Rojas-Medar, M. D.: On the existence of the stationary solution to the equations of natural convection with boundary data in L2. Proc. R. Soc. lond. Ser. A, math. Phys. eng. Sci. 459, No. 2031, 609-621 (2003) · Zbl 1047.76119

format: plain


text:
Browse > Graphs > Graph Classification

# Graph Classification Edit

23 papers with code · Graphs

Trend Dataset Best Method Paper title Paper Code Compare

# Capsule Graph Neural Network

The high-quality node embeddings learned from the Graph Neural Networks (GNNs) have been applied to a wide range of node-based applications and some of them have achieved state-of-the-art (SOTA) performance.

376
01 May 2019

# Capsule Neural Networks for Graph Classification using Explicit Tensorial Graph Representations

22 Feb 2019BraintreeLtd/PatchyCapsules

Building on prior work combining explicit tensor representations with a standard image-based classifier, we propose a model to perform graph classification by extracting fixed size tensorial information from each graph in a given set, and using a Capsule Network to perform classification.

33
22 Feb 2019

# Simplifying Graph Convolutional Networks

19 Feb 2019Tiiiger/SGC

Graph Convolutional Networks (GCNs) and their variants have experienced significant attention and have become the de facto methods for learning graph representations.

175
19 Feb 2019

# A simple yet effective baseline for non-attribute graph classification

8 Nov 2018Chen-Cai-OSU/LDP

We test our baseline representation for the graph classification task on a range of graph datasets.

1
08 Nov 2018

# A Simple Baseline Algorithm for Graph Classification

Graph classification has recently received a lot of attention from various fields of machine learning e. g. kernel methods, sequential modeling or graph embedding.

6
22 Oct 2018

# Weisfeiler and Leman Go Neural: Higher-order Graph Neural Networks

4 Oct 2018k-gnn/k-gnn

We show that GNNs have the same expressiveness as the $1$-WL in terms of distinguishing non-isomorphic (sub-)graphs.

14
04 Oct 2018

# How Powerful are Graph Neural Networks?

Here, we present a theoretical framework for analyzing the expressive power of GNNs to capture different graph structures.

2
01 Oct 2018

# Graph Edit Distance Computation via Graph Neural Networks

16 Aug 2018benedekrozemberczki/SimGNN

Graph similarity/distance computation, such as Graph Edit Distance (GED) and Maximum Common Subgraph (MCS), is the core operation of graph similarity search and many other applications, but very costly to compute in practice.

62
16 Aug 2018

# Attention Models in Graphs: A Survey

20 Jul 2018zhliping/Deep-Learning

However, in the real-world, graphs can be both large - with many complex patterns - and noisy which can pose a problem for effective graph mining.

2
20 Jul 2018

# Graph Classification using Structural Attention

Graph classification is a problem with practical applications in many different domains.

74
19 Jul 2018


text:
# The common ethanol content of wine has increased during the last

The common ethanol content of wine has increased during the last 2 decades. substances such as for example glycerol and succinic acidity for and isoamyl isoamyl and acetate alcoholic beverages for sequential fermentations. The overall outcomes indicated a guaranteeing ethanol reduction could possibly be acquired using sequential fermentation of immobilized chosen non-strains. In this real way, the right timing of second inoculation Vitexin manufacturer and an improvement of analytical profile of wines were acquired. candida, sequential fermentation, wines Introduction During the last few years, there’s been a intensifying upsurge in the ethanol content material in wines due to fresh wines styles due to consumer preference, also to the global weather change that’s often connected with improved grape maturity (Jones Vitexin manufacturer et al., 2005; Give, 2010; MacAvoy, 2010; Alstona et al., 2011; Gonzalez et al., 2013). Nevertheless, wines with high degrees of ethanol could be recognized because of health issues adversely, wines quality decrease and taxation prices relating to ethanol content material (Guth and Sies, 2001; Aths et al., 2004; Gawel et al., 2007). With this framework, many lines of study are targeted at reducing the ethanol content material of wines, that have generally centered on vineyard management and winemaking practices, and particularly on the de-alcoholization of wine (Belisario-Snchez et al., 2009; Kutyna et al., 2010; Stoll et al., 2010; Schmidtke et al., 2012; Bindon et al., 2013). Considering microbiological applications, several strategies that use genetically modified strain have also been proposed for reduction of alcohol content in wine (Ehsani et al., 2009; Kutyna et al., 2010; Varela et al., 2012). More recently, Tilloy et al. (2014) used evolution-based strategies together Rabbit Polyclonal to SIRT2 with breeding strategies to show that evolved or hybrid strains can led to ethanol reductions of 0.6 to 1 1.3% (v/v) in comparison with the ancestral strains. Another approach to reduce the production of ethanol might be the use of non-wine yeast as part of the natural microbiota present on grapes and winemaking equipment during grape juice fermentation (Renouf et al., 2005, 2007). The use of non-yeast in combination with has been proposed to improve the quality and enhance the complexity of wine (Jolly et al., 2014; Capozzi et al., 2015). Thus, the use of controlled multistarter fermentation using selected cultures of non-and yeast strains has been encouraged (Ciani and Comitini, 2011; Comitini et al., 2011; Domizio et al., 2011; Magyar and Tth, 2011; Di Maio et al., 2012; Ehsani et al., Vitexin manufacturer 2012; Morata et al., 2012; Jolly et al., 2014). In this context, non-wine yeast and multistarter fermentation may have a role in the reduced amount of the ethanol content material in wines. The wide variability amongst non-yeast concerning ethanol produce, fermentation effectiveness, biomass creation, by-product formation, and respiro-fermentative rate of metabolism enable you to decrease the ethanol focus in wines. Among non-wine yeasts some strains/varieties demonstrated low ethanol produce and sugar usage by Vitexin manufacturer respiration (Crabtree adverse). Using these chosen strains, 1C2% v/v of ethanol decrease was accomplished but prolonged period of sequential inoculation or higher level of acetic acidity were demonstrated (Contreras et al., 2014; Gobbi et al., 2014; Quirs et al., 2014). Sequential fermentation effectively setup may be an attractive device for the usage of non-yeast for the reduced amount of the ethanol content material in wines. This fermentative strategy, in which a short inoculation of the non-strain is accompanied by inoculation from the beginner strain, allows the metabolism from the 1st inoculated candida to become exploited without as well great an impact on any risk of strain. To take advantage of the metabolic particularities of some non-yeast in sequential fermentation (i.e., low ethanol produce, low fermentation effectiveness), the inoculation level and the duration of the interval between the first and second inoculations are fundamental. An enhancement of the inoculation level of non-yeast will improve the competitiveness toward wild yeast.


text:
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# /sci/ - Science & Math

[ Toggle deleted replies ]
File: 9 KB, 479x225, 3-list-equations-gravitation.jpg [View same] [iqdb] [saucenao] [google] [report]

I just can't wrap my head around how dumb this equation is. Is this 1. even accurate?

A lot of equations aren't even true.

2. Why do they need to use symbols for this?

It says that the "force" of gravity is equal to a constant times the two masses of the objects divided by the square of the distance between the objects.

First off, is the "G" constant actually necessary here? Or is that just because they are using incorrect units (ie the metric system) and they need to add the constant to adjust for their shitty units?

Or is the constant absolutely necessary and you cant just change the units instead?

3. Are you gonna say why the distance is squared? What information does this stupid shit convey if you can't just explain it like you understand it?

Scientists are so fucking stupid I swear.

Is r^2 even distance here?

Do they even want to preach their "truth" to the public? Should the public have a right to know what they are doing? No?

If they can't even do a good job simplifying the simple things, what are they doing with the complicated things?

 >> Anonymous Wed Apr 24 14:57:26 2019 No.10587101 >>10587093>Is this 1. even accurateNo. Gravity isn't felt instantaneously at a distance.
 >> Anonymous Wed Apr 24 15:00:21 2019 No.10587106 >>10587101See what I mean?Then why is this even an equation?Fucking equations are dumb and not even correct half the time
 >> Anonymous Wed Apr 24 15:01:41 2019 No.10587111 >>10587093>3. Are you gonna say why the distance is squared? What information does this stupid shit convey if you can't just explain it like you understand it?When’s the last time you saw an equation with an explaination included with it? Are you too mentally defective to google something?The distance is squared because of the inverse-square law, the same reason that a light source appears fours times as dim when you double its distance from you
 >> Anonymous Wed Apr 24 15:03:09 2019 No.10587115 >>10587106>Fucking equations are dumb and not even correct half the timeIf I could say that about you, it would be an improvement
 >> Anonymous Wed Apr 24 15:04:28 2019 No.10587117 File: 714 KB, 344x426, 32F80ED7-B957-4CE6-8027-90D9FC94516B.gif [View same] [iqdb] [saucenao] [google] [report] >>10587111>the equation is an inverse square law because of the inverse square law
 >> Anonymous Wed Apr 24 15:08:55 2019 No.10587124 >>10587117>I don’t understand the inverse square law
 >> Anonymous Wed Apr 24 15:09:00 2019 No.10587125 File: 3 KB, 124x124, citation-needed.jpg [View same] [iqdb] [saucenao] [google] [report] >>10587093>A lot of equations aren't even true.[citation needed]
 >> Anonymous Wed Apr 24 15:13:31 2019 No.10587134 >Why do they need to use symbols for this?I don't even know where to start with that. What do you think we should use instead of symbols? The equation says that the forces two objects feel due to the gravitational force is proportional to the masses of both objects and inversely proportional to the distance squared. The r^2 shows up because there is spherical symmetry in the gravitational field, which is why gravity is 9.81 everywhere on the surface of the earth, and the surface area of a sphere is proportional to r^2. This means as you move farther away, the increase in area you have to work with is proportional to r^2.
 >> Anonymous Wed Apr 24 15:20:06 2019 No.10587148 >>10587093>1It's reasonably accurate. Accurate enough for spaceflight. Accurate enough to be useful.>2What do you even mean? The symbols either represent variables (which don't have a value until you use the equation) or constants (which writing one symbol is more convenient than writing out the whole number).G isn't used for unit conversion. It's used to properly scale the force much like how pi is used to scale a diameter to a circumference.>3r is squared because gravity is taken to act spherically. At a certain radius away from an object, the area that the object's gravity has to work with is greater than the area if the radius is smaller. A consequence of this is that gravity becomes weaker at a distance and stronger when closer. The area is proportional to the square of the radius.>Do they even want to preach their "truth" to the public? Should the public have a right to know what they are doing? No?What are you even on about? Newtonian gravity isn't considered how gravity really works, its taken as a convenient model that makes good predictions within useful bounds.>If they can't even do a good job simplifying the simple things, what are they doing with the complicated things?Newtonian gravity is incredibly simple compared to Einsteinian gravity.
 >> Anonymous Wed Apr 24 15:27:58 2019 No.10587159 >>10587093Oh hey, we've got a genius over there. How about you just read about how each equation gets derived? You can even mathematically proof them, isn't that great? Just because you don't understand it doesn't mean its stupid, it means you are stupid
 >> Anonymous Wed Apr 24 15:28:43 2019 No.10587160 >>10587093> 1. even accurate?Good enough to put objects in orbit.But not as precise as the geodesic equation in general realtivity:${d^2 x^\mu \over ds^2}+\Gamma^\mu {}_{\alpha \beta}{d x^\alpha \over ds}{d x^\beta \over ds}=0$.> First off, is the "G" constant actually necessary here? Or is that just because they are using incorrect units (ie the metric system) and they need to add the constant to adjust for their shitty units?No, G is not necessary. It's just there so the units work out consistanly.> Are you gonna say why the distance is squared? The reason why the force in porpoptional to units of one over distance squared is because it's solves the orbitt eqauation....which stays consistance with Kepler's laws of planatry motion.
 >> Anonymous Wed Apr 24 15:29:02 2019 No.10587164 >>10587125>>10587093Equatrions aren't "true", much the same way your hand drawn map to the pizza place isn't true, it's just works well enough to make predictions with.
 >> Anonymous Wed Apr 24 15:31:53 2019 No.10587169 >>10587159Read through my replies ITT again, nimrod.Next.
 >> Anonymous Wed Apr 24 15:32:42 2019 No.10587172 >>10587093the ultimate goal of science is the formalization and intellectualization of the real world.
 >> Anonymous Wed Apr 24 15:34:10 2019 No.10587175 >>10587164^ThisSome people seem to have the idea that science needs to find absolute truths and that anything less is unacceptable. This idea is wrong, science aims to explain things as good as possible.For example, in aerospace engineering alot of modeling flows is just "we have no idea how this flow acts nor we have any way of finding out, but lets assume that it acts in some arbitrary way and work out how that arbitrary flow should behave" and then they compare it to empirical data. The arbitrary choice that's closest to the data is then chosen as the standard model. And this is all perfectly acceptable.
 >> Anonymous Wed Apr 24 15:40:27 2019 No.10587189 >>10587106>Then why is this even an equation?Because it's an extremely good approximation and its utility in engineering justifies it.
 >> Anonymous Wed Apr 24 15:43:27 2019 No.10587195 >>10587106>Fucking equations are dumb and not even correct half the timeIts accurate enough to send probes across the solar system. You're just being obtuse. Stop that.
 >> Anonymous Wed Apr 24 15:45:30 2019 No.10587201 >>10587175Well maybe to you engicucks it is, but for physishits getting the equation exactly correct is absolutely paramount.
 >> Anonymous Wed Apr 24 15:47:07 2019 No.10587207 >>10587201You're a retard and you really shouldn't be in physics if you can't grasp what I've just said.
 >> Anonymous Wed Apr 24 15:47:43 2019 No.10587210 File: 341 KB, 491x335, Aslongasitworks.png [View same] [iqdb] [saucenao] [google] [report]
 >> Anonymous Wed Apr 24 15:49:30 2019 No.10587216 >>10587201Confirmed for not knowing physics. Reminder that guess and check empiricism is a logically rigorous approach to science.
 >> Anonymous Wed Apr 24 15:55:00 2019 No.10587220 >>10587115Anything is an improvement over you however.>>10587111>>10587117Once again, you're not smart.>>10587125E = mc^2 is not true>>10587134English>>10587148The equation should mention those things.>>10587159I invented math, I don't need to know it, I'm telling you your equation is dumb and not equivalent to the math I invented.
 >> Anonymous Wed Apr 24 15:56:27 2019 No.10587231 >>10587220>The equation should mention those things.What do you mean?
 >> Anonymous Wed Apr 24 15:58:11 2019 No.10587236 >>10587231A bunch of symbols does not convey knowledge.This equation is not stating anything that can't be fully fundamentally explained in a few sentences in English.
 >> Anonymous Wed Apr 24 16:00:09 2019 No.10587248 I've already done all this math stuff before and my current purpose doesn't require me to know how to do it now, but I know that you're all doing it wrong at least.
 >> Anonymous Wed Apr 24 16:01:03 2019 No.10587249 File: 132 KB, 739x673, 1538768297082.jpg [View same] [iqdb] [saucenao] [google] [report] >>10587201How does it feel to have no clue about physics?
 >> Anonymous Wed Apr 24 16:03:27 2019 No.10587264 >>10587236>A bunch of symbols does not convey knowledge.They do. How do you think written language works?>This equation is not stating anything that can't be fully fundamentally explained in a few sentences in EnglishA bunch of variable symbols is much easier to write and read than writing out full sentences. Sure, its inconvenient if you don't know what those symbols mean, but for an equation like Newton's model of gravity you can just look it up. Was using wikipedia too hard for you?
 >> Anonymous Wed Apr 24 16:05:32 2019 No.10587267 >>10587264>A bunch of variable symbols is much easier to write and read than writing out full sentences. Sure, its inconvenient if you don't know what those symbols mean, but for an equation like Newton's model of gravity you can just look it up. Was using wikipedia too hard for you?You just don't get it do you?
 >> Anonymous Wed Apr 24 16:07:59 2019 No.10587273 >>10587093Great, another "retard who knows literally nothing about physics is going to PWN physicists" post. Fuck off and read a book harder than Winnie the Pooh.
 >> Anonymous Wed Apr 24 16:08:25 2019 No.10587274 >>10587273You just don't get it do you?
 >> Anonymous Wed Apr 24 16:08:47 2019 No.10587277 >>10587093I want to punch you in the fucking face
 >> Anonymous Wed Apr 24 16:10:21 2019 No.10587282 >>10587277Then you are a monkey and you aren't smart. Congrats for reading work that other people did before you. You should feel accomplished for worshiping a dumb incorrect equation
 >> Anonymous Wed Apr 24 16:11:46 2019 No.10587286 OP wants to write math like Euclid i suppose.
 >> Anonymous Wed Apr 24 16:12:06 2019 No.10587288 File: 8 KB, 200x140, 200px-NewtonsLawOfUniversalGravitation.svg.png [View same] [iqdb] [saucenao] [google] [report] Anybody who hates this thread has negative iq points. None of you were involved in making these equations and they were just given to you.They aren't good and can be improved. What's wrong with stating that?Fuck off losers.
 >> Anonymous Wed Apr 24 16:12:38 2019 No.10587291 >>10587267Actually you don't get it. If you actually read your textbook, you'd know what all those symbols mean at first glance. Same goes for Maxwell's equations, and a million other physical laws. You are essentially complaining about vocabulary.
 >> Anonymous Wed Apr 24 16:13:56 2019 No.10587298 >>10587288How would you improve them (we aren't assuming general relativity)?
 >> Anonymous Wed Apr 24 16:14:12 2019 No.10587299 >>10587291I do know what the equation means, and I still believe it can be improved.
 >> Anonymous Wed Apr 24 16:14:56 2019 No.10587302 >>10587299How?
 >> Anonymous Wed Apr 24 16:15:57 2019 No.10587308 >>10587282Now I want to skin you alive you brainlet Mongrel. This is why we need to teach kids the history behind equations instead of simplifying them too much that they start posting shit like this
 >> Anonymous Wed Apr 24 16:17:42 2019 No.10587318 >>10587308You weren't involved in the history of the equation yet you take offense to it like you were involved. All you represent is not the equations but rather some asshole on the internet that's what you are. And you hate people who you think are ungrateful but you are the ungrateful one.If it wasn't for opposition to the paradigm then science wouldn't exist you fucking hypocritical 0 IQ wild ANIMAL. You sound more like a serial killer than an intellectual FUCK YOU!
 >> Anonymous Wed Apr 24 16:18:52 2019 No.10587321 >>10587291Only retards say "actually"
 >> Anonymous Wed Apr 24 16:19:55 2019 No.10587329 File: 134 KB, 775x800, 7b8e6466a1507eff15c515797f40ac9e.jpg [View same] [iqdb] [saucenao] [google] [report] >>10587093The actual equations is $\mathbf{F}_{g,12}=-G\frac{m_1m_2}{r_{12}^2}\mathbf{\hat{r}}_{12}$. Btw, you're a retard OP.
 >> Anonymous Wed Apr 24 16:20:25 2019 No.10587332 >>10587318You sound like you came form reddit, how about you go read a book and shove that arrogance up your asshole, cunt
 >> Anonymous Wed Apr 24 16:21:04 2019 No.10587336 >>10587321Only retards don't answer the fucking question>>10587302>>10587298
 >> Anonymous Wed Apr 24 16:21:07 2019 No.10587337 >>10587298>>10587299How can they be "improved"? The only issues you've brought up were either limitations of the medium of which equations are written on ("why use all these symbols???") or blatantly misunderstanding of the equation ("Is G a conversion factor?").
 >> Anonymous Wed Apr 24 16:21:08 2019 No.10587338 >>10587308You're the insult to science here not me.>>10587302Teach it to people exactly like this:"The center of mass of an object is the main gravitational factor of the object. We take the distance between the two centers of the objects and call that distance r. The gravitational attraction is the same for both objects and it is relative to their respective masses. Force = mass of object 1 times mass of object 2, the force is then divided by the distance from object 1 to object 2 times the distance from object 2 to object 1. The units are corrected with G"That is what I meant with this thread. Happy now?>they do teach it like that alreadyKnow they DONT screw you if you think otherwise
 >> Anonymous Wed Apr 24 16:22:59 2019 No.10587347 >>10587338In addition to this, I wouldn't use the metric system for G unless you were actually applying it to something.I am OP. This is what I meant by this thread.
 >> Anonymous Wed Apr 24 16:23:54 2019 No.10587350 >>10587338Do you think that physics students aren't taught in this way or something?
 >> Anonymous Wed Apr 24 16:24:22 2019 No.10587351 >>10587321Only retards say 'Only retards say "actually"'
 >> Anonymous Wed Apr 24 16:25:04 2019 No.10587357 >>10587338If you can't read math, you should consider other line of work.
 >> Anonymous Wed Apr 24 16:25:18 2019 No.10587359 >>10587350Yes, that's why I mentioned it in the post.I think it should be taught roughly to how I said it just now.
 >> Anonymous Wed Apr 24 16:26:55 2019 No.10587364 Okay listen to me very carefully:What I am about to say is RIGHT:The r^2 is not an accurate depiction of what the equation is referring to.The r^2 should be d1*d2.Distance 1 is the distance from m1 to m2 and Distance 2 is the distance from m2 to m1.Saying r^2 is NOT correct even though it evaluates to the same number.I invented math and I don't like seeing math being done wrong.
 >> Anonymous Wed Apr 24 16:27:23 2019 No.10587367 >>10587338>"The center of mass of an object is the main gravitational factor of the object. We take the distance between the two centers of the objects and call that distance r. The gravitational attraction is the same for both objects and it is relative to their respective masses. Force = mass of object 1 times mass of object 2, the force is then divided by the distance from object 1 to object 2 times the distance from object 2 to object 1. The units are corrected with G"I've had two spaceflight mechanics classes and apart from "units are corrected with G" this is pretty much exactly how it was taught. This is also how Wikipedia explains it.You're complaining about a non-issue.Using Wikipedia is apparently too hard for you, again.
 >> Anonymous Wed Apr 24 16:27:56 2019 No.10587369 >>10587364I have a similar issue with G.I prefer things in their CORRECT and FUNDAMENTAL form.You all are skipping past what I'm saying and it's flying over your conceded, violent, heads.
 >> Anonymous Wed Apr 24 16:29:08 2019 No.10587374 >>10587367No, no, no, the equation uses r^2 not d1 and d2.And the equation uses metric system units, which I don't like either.I'm not disrespecting math or science or history either, I invented math. I think this equation is disrespecting math.I'm RIGHT just accept it.
 >> Anonymous Wed Apr 24 16:34:14 2019 No.10587389 >>10587381I said "is it even accurate" because I already knew it wasn't. Gravity is more complex, it is only accurate in Newtonian physics.>Why do they need to use symbols for this?Don't get me wrong here, I'm not insulting their way of doing things, but I don't believe that an equation this simple should be written in the messy way that it is.>G is necessary but they use it in metric for some reason, it's not fundamental enough for me.>inverse square lawI already know what the inverse square law is but you are so reluctant to just speak normally and explain things correctly.
 >> Anonymous Wed Apr 24 16:36:03 2019 No.10587392 >>10587220>E = mc^2 is not trueYes it is, you absolute loon. It's not the full equation (You can look it up if you need to see it), but it is the consequence of quantifying the energy contained within an object that is stationary with respect to some observer. If you use the full equation that describes the relationship between mass and energy, you'll see that there is additional energy carried within the object as a consequence of motion. If you set the velocity of an object to zero, and solve for E in the equation, then E = mc^2 pops out. Get over yourself, dipshit.
 >> Anonymous Wed Apr 24 16:36:08 2019 No.10587394 You simply cannot refute me (OP).
 >> Anonymous Wed Apr 24 16:36:16 2019 No.10587395 good bait, OP. you sure trolled those 4channers epic style!!
 >> Anonymous Wed Apr 24 16:36:18 2019 No.10587396 >>10587374>No, no, no, the equation uses r^2 not d1 and d2The magnitudes of d1 and d2 are the same so theres no point to make the distinction unless you're using vectors.>And the equation uses metric system units, which I don't like either.No. Newton's model of gravity isn't tied to any system of units. As long as your units are consistent, you can use any system with the equation. Sure, there is a preference in the aerospace industry to use metric for orbital mechanics, but that's just an arbitrary standard.>I'm not disrespecting math or science or history either, I invented math. I think this equation is disrespecting math.How is the equation disrespecting math?>I'm RIGHT just accept it.I disagree and don't accept it.
 >> Anonymous Wed Apr 24 16:37:53 2019 No.10587399 >>10587392I'm not a dipshit and I don't need to get over myself because I am smarter than you. I know that E = mc^2 is not the full equation and that's what I was referring to when I said it is not true.Because it's NOT true, the full equation results in E = mc^2 when an object is stationary but there are no stationary objects in practice anyways. Why do you feel the need to debate so hard against me instead of trying to take my side? I AM right afterall.
 >> Anonymous Wed Apr 24 16:39:07 2019 No.10587405 >>10587396Yes, there is a point in making a distinction. Because the equation is saying the wrong thing if you say r^2.
 >> Anonymous Wed Apr 24 16:39:59 2019 No.10587409 >>10587389>I said "is it even accurate" because I already knew it wasn't. Gravity is more complex, it is only accurate in Newtonian physics.What the fuck are you even talking about? Are you bitching because you can't immediately see that gravity is not truly a "Force" but rather depressions in the fabric of space-time? Regardless, its behavior is accurately described by the equation you have some pathetically vitriolic bitterness towards. The equation does not "Tell the full story," but if your question is literally "What is the force of gravity exerted between two objects of known masses?" This is LITERALLY what you use to answer that question. >Don't get me wrong here, I'm not insulting their way of doing things, but I don't believe that an equation this simple should be written in the messy way that it is.How the fuck else do you want this law represented other than this equation? >I already know what the inverse square law is but you are so reluctant to just speak normally and explain things correctly.This has to be bait. It has to be.
 >> Anonymous Wed Apr 24 16:40:14 2019 No.10587411 >>10587405>Because the equation is saying the wrong thing if you say r^2.How so?
 >> Anonymous Wed Apr 24 16:40:32 2019 No.10587413   File: 271 KB, 500x479, cleves.jpg [View same] [iqdb] [saucenao] [google] [report] But even if we stopped using the metric system, G would still be necessary. From Newton's second law, $\sum\mathbf{F}=m\mathbf{a}$ we can see that force has the dimensions $\frac{\text{mass}\times\text{length}}{\text{time}^2}$. Note this has nothing to do with our choice of units. Newton and Kepler noticed that gravitational force is proportional to the product of the masses of the objects and inversely proportional to the square of the distance between them. This is way too fucking long to say so we say $F_g\propto\frac{m_1m_2}{r^2}$. Notice the right side of this proportionality statement (NOT an equation) doesn't have the correct dimensions. Thus there MUST be a constant of proportionality with dimensions $[G]=\frac{\text{force}\times\text{time}^2}{\text{mass}\times\text{length}}$. Which is exactly the system we have and how it was taught to me. Notice none of this was dependent on whether we used metric or british units or anything.tl;dr you're wrong
 >> Anonymous Wed Apr 24 16:42:01 2019 No.10587419 >>10587288What do you think the equation is trying to convey if you had to put it in your own words? Like why do you think anyone cares about it to begin with? I'm not sure you even understand that much.
 >> Anonymous Wed Apr 24 16:42:04 2019 No.10587420 File: 2 KB, 324x74, fixed it for you.png [View same] [iqdb] [saucenao] [google] [report]
 >> Anonymous Wed Apr 24 16:42:16 2019 No.10587421   File: 201 KB, 1024x867, 1024px-Edouard_Manet_022.jpg [View same] [iqdb] [saucenao] [google] [report] But even if we stopped using the metric system, G would still be necessary. From Newton's second law, $\sum\mathbf{F}=m\mathbf{a}$ we can see that force has the dimensions $\frac{\text{mass}\times\text{length}}{\text{time}^2}$. Note this has nothing to do with our choice of units. Newton and Kepler noticed that gravitational force is proportional to the product of the masses of the objects and inversely proportional to the square of the distance between them. This is way too fucking long to say so we say $F_g\propto\frac{m_1m_2}{r^2}{/math}. Notice the right side of this proportionality statement (NOT an equation) doesn't have the correct dimensions. Thus there MUST be a constant of proportionality with dimensions [math][G]=\frac{\text{force}\times\text{time}^2}{\text{mass}\times\text{length}}$. Which is exactly the system we have and how it was taught to me. Notice none of this was dependent on whether we used metric or british units or anything.tl;dr you're wrong so stop embarrassing yourself. the equation is fine.
 >> Anonymous Wed Apr 24 16:42:53 2019 No.10587424 >>10587125This thread is amateur tier bait. The amount of replies goes to show how stupid and naive most of /sci/ really is. I came for a quick visit, now back to /pol/
 >> Anonymous Wed Apr 24 16:43:33 2019 No.10587426 >>10587411Because r^2 = d1*d2 only when they are equal. They ARE equal but that doesn't mean that you can ignore the step...>>10587413>>10587421see>>10587420
 >> Anonymous Wed Apr 24 16:44:59 2019 No.10587431 >>10587420This equation is just more fundamentally correct than the other one.What's wrong with being right?
 >> Anonymous Wed Apr 24 16:45:02 2019 No.10587432 >>10587399>I'm not a dipshit and I don't need to get over myself because I am smarter than you.This isn't a contest, but if it was, you'd be behind the starting line. Don't kid yourself, your scientific literacy is abysmal and I can already tell that from the three bodies of text I've read from you. Plus of the two of us, I'm pretty sure I'm the only one who is actually in the process of earning a physics degree. If you're also doing that, I'd be shocked, impressed, and honestly pretty worried all at the same time. At least maybe then you could realize how poorly you understand this content. >but there are no stationary objects in practice anyways.This is literally one of the fundamental principles of relativity. Yes, stationary objects DO exist, it's a matter of frames of reference. There is no universal "Zero point" by which all relative velocities can be measured. That does not mean in a frame of reference that two objects cannot be stationary with respect to one another. Example: You are stationary with respect to the chair your probably sitting in. If you disagree with me, you have mental health issues.
 >> Anonymous Wed Apr 24 16:46:36 2019 No.10587438 >>10587432There ARE no stationary objects. I DO disagree with you.
 >> Anonymous Wed Apr 24 16:46:56 2019 No.10587439 File: 78 KB, 800x689, 85a8e374f545ed453b8ac1146f7a6bcd.jpg [View same] [iqdb] [saucenao] [google] [report] But even if we stopped using the metric system, G would still be necessary. From Newton's second law, $\sum\mathbf{F}=m\mathbf{a}$ we can see that force has the dimensions $\frac{\text{mass}\times\text{length}}{\text{time}^2}$. Note this has nothing to do with our choice of units. Newton and Kepler noticed that gravitational force is proportional to the product of the masses of the objects and inversely proportional to the square of the distance between them. This is way too fucking long to say so we say $F_g\propto\frac{m_1m_2}{r^2}$.Notice the right side of this proportionality statement (NOT an equation) doesn't have the correct dimensions. Thus there MUST be a constant of proportionality with dimensions $[G]=\frac{\text{force}\times\text{time}^2}{\text{mass}\times\text{length}}$ Which is exactly the system we have and how it was taught to me. Notice none of this was dependent on whether we used metric or british units or anything.tl;dr you're wrong so stop embarrassing yourself. the equation is fine.>third time is the charm
 >> Anonymous Wed Apr 24 16:47:49 2019 No.10587443 >>10587439>"stop embarrassing yourself"This is a quote from the guy who posted the same thing three times because he can't figure out how to used math tags.
 >> Anonymous Wed Apr 24 16:48:11 2019 No.10587446 >>10587439i give up. hey OP: G is necessary regardless of your choice of units. Fuck off.
 >> Anonymous Wed Apr 24 16:48:34 2019 No.10587447 >>10587426>Because r^2 = d1*d2 only when they are equal. They ARE equal but that doesn't mean that you can ignore the step...You have point. When using vectors d1 =/= d2 (if d1 and d2 are vectors). However, mutliplying them together is the same as the squared of the absolute distance between the two objects (i.e. a scalar) so the simplification is acceptable as long as you take into account the vectors in another way. For simple gravitational systems, r^2 is acceptable.
 >> Anonymous Wed Apr 24 16:48:50 2019 No.10587448 File: 17 KB, 218x317, 1556137972058.jpg [View same] [iqdb] [saucenao] [google] [report] >>10587446Ok smart guy
 >> Anonymous Wed Apr 24 16:48:52 2019 No.10587449 >>10587426>Because r^2 = d1*d2 only when they are equal>what is metric space?
 >> Anonymous Wed Apr 24 16:48:58 2019 No.10587450 >>10587438I literally just agreed with you, then explained a critical caveat in the idea that you are ignoring for some inexplicable reason. What do you do for a living? Are you in school?
 >> Anonymous Wed Apr 24 16:49:57 2019 No.10587452 >>10587447>For simple gravitational systems, r^2 is acceptable.I still disagree, I think that you are teaching people the wrong thing and then flaunting about it...
 >> Anonymous Wed Apr 24 16:50:23 2019 No.10587454 >>10587448Ok guy confused by freshman physics
 >> Anonymous Wed Apr 24 16:51:06 2019 No.10587456 >>10587449The equation is still wrong, there needs to be an asterisk in front of it then that says "only true for metric space" if you want to say that.>>10587450I invented math, I am trillions of years old.
 >> Anonymous Wed Apr 24 16:52:08 2019 No.10587458 >>10587454Ok guy confused by 4D chess.
 >> Anonymous Wed Apr 24 16:52:21 2019 No.10587459 >>10587456Now I know you're fucking with me, but I'll clarify one last thing for any poor soul reading this mess of an argument. You do realize that the distance from me to you is the same distance from you to me, correct? You can't seem to wrap your head around this squared distance business.
 >> Anonymous Wed Apr 24 16:54:01 2019 No.10587464 >>10587459You do realize that even though the values are the same, you are saying two different things correct? Are you just going to ignore the distinction?
 >> Anonymous Wed Apr 24 16:54:27 2019 No.10587467 >>10587456apparently that is how we measure our reality; using axioms of real analysis and topology
 >> Anonymous Wed Apr 24 17:32:05 2019 No.10587558 >>10587093equations in science aren't "true" or "false" retard
 >> Anonymous Wed Apr 24 20:17:38 2019 No.10587882 >>10587558what are they then?
 >> Anonymous Wed Apr 24 21:07:51 2019 No.10588027 >>10587882all models are wrong
 >> Anonymous Wed Apr 24 21:09:02 2019 No.10588032 >>10588027>all models are wrongLol that's more like it.So what do you consider a model's use then? It's "accuracy?"Do you think it's impossible to figure out the Truth via science? (Science is cheating by the way.)
 >> Anonymous Wed Apr 24 21:18:09 2019 No.10588047 File: 30 KB, 569x357, f=ma.png [View same] [iqdb] [saucenao] [google] [report] You think that's bad? This equation serves as the definition of Force, AND mass
 >> Anonymous Wed Apr 24 21:24:02 2019 No.10588062 >>10588047Acceleration relative to what?
 >> Anonymous Wed Apr 24 21:25:29 2019 No.10588069 >>10587093stop making the same kind of posts, they arent entertaining and nothing of value is said.
 >> Anonymous Wed Apr 24 21:29:09 2019 No.10588077 >>10588032a model is useful if it helps us understand the universe better, explain observed phenomena, or is useful for applications. obviously accuracy is part of that, but all models breakdown at some point or have something missing. newtons law is useful and very accurate on certain scales. then general relativity is useful and accurate on larger scales, but still needs to be reconciled with quantum physics. even then that theory of quantum gravity wont be "true". i think we could only determine absolute "truth" in science if we become some godlike beings.
 >> Anonymous Wed Apr 24 21:31:39 2019 No.10588085 >>10588077Your obsession with man gaining power is the problem. There are already celestial entities and One God. They already know the answers.Lol.
 >> Anonymous Wed Apr 24 21:32:17 2019 No.10588087
 >> Anonymous Wed Apr 24 21:36:11 2019 No.10588095 >>10588027>all models are wrongNot the climate models which correctly predict catastrophic global warming unless we take dramatic action now.
 >> Anonymous Wed Apr 24 21:43:42 2019 No.10588116 >>10588062It's worse, because if you observe an acceleration a force is "assumed". So any acceleration we observe, we then use F=ma to catalog the force that must exist on that object.This is used in relativity to transfer forces between frames, and it's also used to justify things like OP's equation. Any acceleration is defined to have a force associated, the definition of acceleration itself is a force
 >> Anonymous Wed Apr 24 21:48:53 2019 No.10588126 >>10588116That makes sense.
 >> Anonymous Wed Apr 24 21:51:54 2019 No.10588132 >>10588126But remember also that "mass" is defined as what acceleration an object undergoes when under a certain "force"So F=ma defines both Mass, and Force. It's basically defining itself to be true.
 >> Anonymous Wed Apr 24 21:56:10 2019 No.10588146 >>10587299Your problem is a lack of education, not a lack of proper documentation. The world doesn't revolve around you, and there's no obligation for people to sacrifice brevity and rigor in order to spoonfeed you something that can be obtained through going to school. OP's terminal degree is a GED. And he's also a faggot.
 >> Anonymous Wed Apr 24 23:30:46 2019 No.10588343 >>10587459>You do realize that the distance from me to you is the same distance from you to me, correct?t. brainlet who thinks space is warped isotropically by gravity
 >> Anonymous Wed Apr 24 23:31:05 2019 No.10588345 >>10587093what a retarded post
 >> Anonymous Thu Apr 25 00:42:59 2019 No.10588482
 >> Anonymous Thu Apr 25 02:19:37 2019 No.10588665 File: 36 KB, 708x503, 30740616_2022828871266858_2557402374771572736.jpg [View same] [iqdb] [saucenao] [google] [report]
 >> Anonymous Thu Apr 25 05:35:10 2019 No.10589020 >>10587236>A bunch of symbols does not convey knowledge.Seems like you have never read a book, since this is the exact reason there are EXPLAINATIONS and INTRODUCTIONS before and after all formulas>This equation is not stating anything that can't be fully fundamentally explained in a few sentences in English.First of all, THIS equation MIGHT be easily explainable in English; this doesn't mean that the majority of other equations can. If you really want to understand how retarded you truly are I suggest you reading old maths or physics books before the usage of variables and formulas was common. You will find difficult even understanding besic trigonometry theorems and proofs.Nice troll btw
 >> Anonymous Thu Apr 25 05:38:39 2019 No.10589028 File: 46 KB, 502x494, anyway.jpg [View same] [iqdb] [saucenao] [google] [report] > this thread
 >> Anonymous Thu Apr 25 06:00:28 2019 No.10589056 >>10587338That’s how I was taught it when I did my physics unit. You’re just an idiot, or you went to a shit school/college (or both).You also got the radius portion of your explanation completely wrong. r is just the distance between them, direction doesn’t matter, and it’s only taken once. This is because of the spherical symmetry of the force, as has been stated above. It’s the same reason light intensity and electrical charge, among many other things, are also inversely proportional to distance squared.
 >> Anonymous Thu Apr 25 06:53:33 2019 No.10589137 File: 37 KB, 500x495, 16386912_1269758459771795_8359589282343002139_n.jpg [View same] [iqdb] [saucenao] [google] [report] >>10587338>"The center of mass of an object is the main gravitational factor of the object. We take the distance between the two centers of the objects and call that distance r. The gravitational attraction is the same for both objects and it is relative to their respective masses. Force = mass of object 1 times mass of object 2, the force is then divided by the distance from object 1 to object 2 times the distance from object 2 to object 1. The units are corrected with G"That's a horrible way of explaining it
 >> Anonymous Thu Apr 25 07:30:42 2019 No.10589195 >>10587093We could Just move G to the other side to make it$\frac{F}{G} = \frac{m_1m_2}{r^{2}}$And then make the new unit for force that $\frac{F}{G}$ and remove the G from the equation altogether.But then for every other equation we would have to adjust for that by multiplying the end result by G.You'd get retarded shit like $F = Gma$.The point is that its better to "adjust" one equation than every other equation, there just isn't a system of units that'll account for everything.
 >> Anonymous Thu Apr 25 08:03:23 2019 No.10589225 >>10589195$c = \hbar = k_{B} = G = e = 1$Now what, bitch
 >> Anonymous Thu Apr 25 13:17:52 2019 No.10589873 >>10587164>Equatrionswhat-everrr
 >> Anonymous Thu Apr 25 13:19:26 2019 No.10589875 >>10587399>I'm not a dipshit>I'm not, I'm not,I'm notYes you are.
>>


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# Properties

 Label 2.1575.8t11.a.b Dimension $2$ Group $Q_8:C_2$ Conductor $1575$ Root number not computed Indicator $0$

# Related objects

## Basic invariants

 Dimension: $2$ Group: $Q_8:C_2$ Conductor: $$1575$$$$\medspace = 3^{2} \cdot 5^{2} \cdot 7$$ Artin stem field: Galois closure of 8.0.558140625.1 Galois orbit size: $2$ Smallest permutation container: $Q_8:C_2$ Parity: odd Determinant: 1.35.2t1.a.a Projective image: $C_2^2$ Projective field: Galois closure of $$\Q(\sqrt{-3}, \sqrt{-7})$$

## Defining polynomial

 $f(x)$ $=$ $$x^{8} - x^{7} - 10x^{6} + 11x^{5} + 34x^{4} - 29x^{3} - 55x^{2} + 4x + 76$$ x^8 - x^7 - 10*x^6 + 11*x^5 + 34*x^4 - 29*x^3 - 55*x^2 + 4*x + 76 .

The roots of $f$ are computed in $\Q_{ 109 }$ to precision 5.

Roots:
 $r_{ 1 }$ $=$ $$22 + 82\cdot 109 + 67\cdot 109^{2} + 26\cdot 109^{4} +O(109^{5})$$ 22 + 82*109 + 67*109^2 + 26*109^4+O(109^5) $r_{ 2 }$ $=$ $$28 + 48\cdot 109 + 52\cdot 109^{2} + 88\cdot 109^{3} + 101\cdot 109^{4} +O(109^{5})$$ 28 + 48*109 + 52*109^2 + 88*109^3 + 101*109^4+O(109^5) $r_{ 3 }$ $=$ $$37 + 97\cdot 109 + 26\cdot 109^{2} + 84\cdot 109^{3} + 23\cdot 109^{4} +O(109^{5})$$ 37 + 97*109 + 26*109^2 + 84*109^3 + 23*109^4+O(109^5) $r_{ 4 }$ $=$ $$40 + 108\cdot 109 + 14\cdot 109^{2} + 80\cdot 109^{3} + 55\cdot 109^{4} +O(109^{5})$$ 40 + 108*109 + 14*109^2 + 80*109^3 + 55*109^4+O(109^5) $r_{ 5 }$ $=$ $$48 + 54\cdot 109 + 82\cdot 109^{2} + 7\cdot 109^{3} + 101\cdot 109^{4} +O(109^{5})$$ 48 + 54*109 + 82*109^2 + 7*109^3 + 101*109^4+O(109^5) $r_{ 6 }$ $=$ $$83 + 92\cdot 109 + 99\cdot 109^{2} + 3\cdot 109^{3} + 65\cdot 109^{4} +O(109^{5})$$ 83 + 92*109 + 99*109^2 + 3*109^3 + 65*109^4+O(109^5) $r_{ 7 }$ $=$ $$89 + 6\cdot 109 + 6\cdot 109^{2} + 68\cdot 109^{3} + 35\cdot 109^{4} +O(109^{5})$$ 89 + 6*109 + 6*109^2 + 68*109^3 + 35*109^4+O(109^5) $r_{ 8 }$ $=$ $$90 + 54\cdot 109 + 85\cdot 109^{2} + 102\cdot 109^{3} + 26\cdot 109^{4} +O(109^{5})$$ 90 + 54*109 + 85*109^2 + 102*109^3 + 26*109^4+O(109^5)

## Generators of the action on the roots $r_1, \ldots, r_{ 8 }$

 Cycle notation $(3,5)(7,8)$ $(1,2)(3,5)(4,6)(7,8)$ $(1,3)(2,5)(4,7)(6,8)$ $(1,4,2,6)(3,7,5,8)$

## Character values on conjugacy classes

 Size Order Action on $r_1, \ldots, r_{ 8 }$ Character value $1$ $1$ $()$ $2$ $1$ $2$ $(1,2)(3,5)(4,6)(7,8)$ $-2$ $2$ $2$ $(1,3)(2,5)(4,7)(6,8)$ $0$ $2$ $2$ $(3,5)(7,8)$ $0$ $2$ $2$ $(1,7)(2,8)(3,6)(4,5)$ $0$ $1$ $4$ $(1,4,2,6)(3,7,5,8)$ $2 \zeta_{4}$ $1$ $4$ $(1,6,2,4)(3,8,5,7)$ $-2 \zeta_{4}$ $2$ $4$ $(1,7,2,8)(3,4,5,6)$ $0$ $2$ $4$ $(1,5,2,3)(4,8,6,7)$ $0$ $2$ $4$ $(1,4,2,6)(3,8,5,7)$ $0$

The blue line marks the conjugacy class containing complex conjugation.


text:
## STNB2017(31è any)

### The Mazur-Tate-Teitelbaum conjecture in the rank one setting.

#### Ponents

Victor Rotger Cerda

#### Resum

We shall explain Rodolfo Venerucci's results on the Mazur-Tate-Teitelbaum exceptional zero conjecture for the $p$-adic $L$-function of an elliptic curve $E/\mathbb{Q}$ of Mordell-Weil rank 1. The key point of the argument is the interplay between the Euler systems of Heegner points and Beilinson-Kato elements. A fundamental tool employed in the proof is the theory of $p$-adic variation of modular forms, special values of $L$-functions and logarithms of cycle classes. Reference: [Ven16]

#### Fitxers

No hi ha fitxers per descarregar

Compte
Llengües:


text:
+1 vote

Five line segments of equal lengths, $\text{PR, PS, QS, QT}$ and $\text{RT}$ are used to form a star as shown in the figure above.

The value of $\theta$, in degrees, is _______________

1. $36$
2. $45$
3. $72$
4. $108$

recategorized

$\textbf{Central Angle Theorem:}$  The Central Angle Theorem states that the central angle from two chosen points $A$ and $B$ on the circle is always twice the inscribed angle from those two points. The inscribed angle can be defined by any point along the outer arc $AB$ and the two points $A$ and $B.$

Now, we can use the above theorem, and get the below diagram,

Now, $10\theta = 360^{\circ}$

$\implies \theta = 36^{\circ}.$

So, the correct answer is $(A).$

by (10.7k points)
edited


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## Memoirs of Joseph René Bellot…with his Journal of a Voyage in the Polar Seas in Search of Sir John Franklin. [1851-52]

Preview

Though much of this takes place on land, Bellot sailed on the Prince Albert as part of a British expedition searching for Franklin. Bellot died in 1853. The work consists of a memoir of Bellot by Julien Lemer (p. 1-87), an introduction by Bellot (p 88-108, reprinted from the Annales Maritimes), and Bellot’s journal, the remainder, though the running heads get confused.


text:
Property holds everywhere except on some subset of arbitrarily small measure is equivalent to holding a.e.?

Suppose a property $P$ may or may not hold on a measurable subset of a measure space with measure $\mu$. Is

for every $ε > 0$, there exists a measurable subset $B$ such that $μ(B) < ε$, and $P$ holds on $B^c$.

equivalent to

there exists a measurable subset $B$ with $μ(B) =0$, and $P$ holds on $B^c$?

For example, Egorov's theorem say that

if $(f_n)$ converges $μ$-almost everywhere on $A$ to a limit function $f$, where $A$ is a measurable subset of finite $μ$-measure, then for every $ε > 0$, there exists a measurable subset $B$ of $A$ such that $μ(B) < ε$, and $(f_n)$ converges to $f$ uniformly on the relative complement $A \setminus B$.

Thanks!

• Hint: Construct measurable subsets $B_n$ such that for any $n\in\mathbb{N}$, $\mu(B_n) = 1/n$ and $P$ holds on $B_n^c$. – Anon Jan 20 '13 at 23:46

No, the two conditions are not equivalent. The second one, trivially, implies the first. But, if all you know is that for every $\epsilon>0$ there is a set with $\mu(B_\epsilon)<\epsilon$ such that property $P$ holds outside of $B_\epsilon$ you can't conclude $P$ holds almost everywhere. Take for instance the property $P$ to be "$\inf {|x|}$ is positive". Then, for every $\epsilon >0$ you can take $B_\epsilon = (-\epsilon/2,\epsilon/2)$ and then $P$ holds outside of $B_\epsilon$. But clearly $P$ does not hold almost everywhere.
• I am (almost!) surely misreading your example, but doesn't $P$ hold on $\mathbb R \setminus \{0\}$. – cardinal Jan 21 '13 at 0:01
The same example given there can be used in a counterexample for Egoroff's theorem. If $C$ is a fat Cantor set and $g:[0,1]\to\mathbb R$ is defined by $g(x)=$ the distance from $x$ to $C$, let $f_n(x)=(1-g(x))^n$ for each $n\in\mathbb N$ (example borrowed from another question). Then $(f_n)_n$ converges pointwise (monotonically) to the characteristic function $f$ of $C$. Each $f_n$ is continuous, so if $(f_n)$ converges uniformly on $A\subseteq [0,1]$, then $f$ is continuous on $A$. But $f$ is not continuous on any subset of $[0,1]$ with measure $1$, as shown in the first linked question above.
This might be a bit confusing in light of the (correct) other answers, but I would say the answer is yes. Suppose that for each $\epsilon>0$, there is a measurable set $N_\epsilon$ with measure less than $\epsilon$ such that property $P$ holds for every element of $N_\epsilon^C$. For each natural number $n>0$, let $N_{1/n}$ be of this form. Then an element that is not in $N_{1/n}$ for at least one $n$ has property $P$. Hence, an element not in $N=\bigcap_n N_{1/n}$ has property $P$ and $N$ has measure zero.


text:
# multipage pdf as separate image in LaTeX [duplicate]

Possible Duplicate:
pdflatex, \includegraphics, and multi-page PDF files

Sometimes I create a multi-page pdf as output, e.g. graphs from R.

Is there a possibility which allows me to select separate pages of a pdf as source for the graphic that will be typeset in Latex?

-
indeed, the question is very similar... you can close this one if you want. – Timtico May 26 '11 at 15:48


text:
Do Do Do Do Dododo Meme Song, Dragon Head Minecraft, Dordt University Baseball Coach, Genetic Genealogy Training For Law Enforcement, Rayman 2 Rom, Accredited Acupuncture School's In Florida, Barnard College Early Decision 2025, T2 Tea Price, Guy Martin Isle Of Man Accident, " /> Do Do Do Do Dododo Meme Song, Dragon Head Minecraft, Dordt University Baseball Coach, Genetic Genealogy Training For Law Enforcement, Rayman 2 Rom, Accredited Acupuncture School's In Florida, Barnard College Early Decision 2025, T2 Tea Price, Guy Martin Isle Of Man Accident, " />

Balmer series is a hydrogen spectral line series that forms when an excited electron comes to the n=2 energy level. This problem has been solved! Careers | The Balmer series is the portion of the emission spectrum of hydrogen that represents electron transitions from energy levels n > 2 to n = 2. Tutor log in | Balmer Series – Some Wavelengths in the Visible Spectrum. What are the suitable reagents for the following conversion? Franchisee | The set of transitions from n ≥ 3 to n = 2 is called the Balmer series and its members are named sequentially by Greek letters: n = 3 to n = 2 is called Balmer-alpha or H-alpha, n = 4 to n = 2 is called H-beta, n = 5 to n = 2 is called H-gamma, etc. These are caused by photons produced by electrons in excited states … Here, λ is the observed wavelength, C is a constant (364.50682 nm), n is the lower energy level with a value of 2, and m is the higher energy level, which has a value greater than 3. If the transition of electron takes place from any higher orbit (principal quantum number = 3, 4, 5, …) to the second orbit (principal quantum number = 2). In which of the following elements number of d-electrons is zero in 6d-orbital? The emission spectrum of atomic hydrogen has been divided into a number of spectral series, with wavelengths given by the Rydberg formula. The Balmer series is characterized by the electron transitioning from n ≥ 3 to n = 2, where n refers to the radial quantum number or principal quantum number of the electron. Application of Gauss law it's second application electric field due to uniformly charged infinite... What happen when Ray of light passes through prism at 90°. Terms & Conditions | One of our academic counsellors will contact you within 1 working day. Dear Historically, explaining the nature of the hydrogen spectrum was a considerable problem in physics.Nobody could predict the wavelengths of the hydrogen lines until 1885 when the Balmer formula gave an empirical formula for the visible hydrogen spectrum. On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be: An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. Set n final to 2. The Balmer series of atomic hydrogen. 656 Nm 545 Nm 365 Nm 344 Nm What Is The Shortest Possible Wavelength In The Lyman Series? Rydberg constant (m-1) 1.098 × 10 7: Its average life will be. Balmer concentrated on just these four numbers, and found they were represented by the phenomenological formula: The difference in refractive index... A rope is used to pull a 2.89kg bucket of water out of a deep well. The four visible Balmer lines of hydrogen appear at 410 nm, 434 nm, 486 nm and 656 nm. The transitions are named sequentially by Greek letter: n = 3 to n = 2 is called H-α, 4 to 2 is H-β, 5 to 2 is H-γ, and 6 to 2 is H-δ. Wavelength (nm) Relative Intensity: Transition: Color or region of EM spectrum: Lymann … Table 2: Frequency and Energy for Each Wavelength. Balmer series is displayed when electron transition takes place from higher energy states(n h =3,4,5,6,7,…) to n l =2 energy state. c) Calculate the initial energy levels (quantum numbers) for each of the four wavelengths (give details on the calculations). The classification of the series by the Rydberg formula was important in the development of quantum mechanics. , -Calculate The Longest Wavelength In The Hydrogen Balmer Spectral Series Question: -Calculate The Longest Wavelength In The Hydrogen Balmer Spectral Series This question hasn't been answered yet Points. Express your answer in units of nm. number, Please choose the valid askiitians. Balmer decided that the most likely atom to show simple spectral patterns was the lightest atom, hydrogen. 1.8k VIEWS. H-alpha light is the brightest hydrogen line in the visible spectral range. See the answer. This formula gives a wavelength of lines in the Balmer series of the hydrogen spectrum. The representation of the hydrogen emission spectrum using a series of lines is one way to go. Balmer’s formula can therefore be written: \frac{1}{\lambda}=R_H(\frac{1}{2^2}-\frac{1}{n_2^2}) Calculating a Balmer Series Wavelength. For the Balmer series, the wavelength is given by $\frac{1}{\lambda} = R\left[ \frac{1}{2^2} - \frac{1}{n_2^2} \right]$ The longest wavelength is the first line of the series for which Identify the final product of the given reaction. Structural Organisation in Plants and Animals. RD Sharma Solutions | The two longest wavelengths of Balmer series of triply ionized beryllium (z=4) are:A)41nm B)30.4nm C)45nm D)39nmIt is a multi correct answer question. If magnesium atom having atomic number 12 has an isotope with mass number 26, then the number of protons, neutrons and electrons respectively of the atom are, Principal, azimuthal and magnetic quantum numbers are respectively related to. In the given reaction : $A + 2B \rightleftharpoons 2C$ moles each of A and B present in 10 L of solution combine to form 1 mole of C. Calculate $K_c$ for the reaction. Privacy Policy | For the Lyman series the naming convention is: n = 2 to n = 1 is called Lyman-alpha, What is the acceleration of the... Sir correect answer with solution Question is provided in the image . This gives the first longest wavelength . Important conclusions follow from these consideration. Question: What Is The Longest Possible Wavelength Emitted In The Balmer Series? 1.8k SHARES. Media Coverage | Points, Please choose a valid Which of the following is true? For emission line of atomic hydrogen from $n_i = 8$ to $n_f$ = the plot of wave number $(\bar{v})$ against $( \frac{1}{n^2})$ will be (The Ry dberg Please answer this it is very URGENT. What is Balmer Series? Q: If a hydrogen atom has its electron in the n=4 state , how much energy in eV is needed to ionize it? Use He discharge lamp for a line with known wavelength (effectively a calibration) Part 2: Balmer series Four visible de-excitation emission lines (i.e. It is obtained in the visible region. b) Explain how the wavelengths can be empirically computed. The spectral series are important in astronomical spectroscopy for detecting the presence of hydrogen and calculating red shifts. , This chemistry video tutorial focuses on the bohr model of the hydrogen atom. That number was 364.50682 nm. FAQ's | If the series limit wavelength of the Lyman series for hydrogen atom si , then the series limit wavelength for the Balmer series for the hydrogen atom is 2:02 300+ LIKES. Show … a) What is the final energy level? Question 2 10 pts Use Equation (1) for the Balmer series to find the wavelength of light emitted by hydrogen corresponding to n-3. The wavelengths of the first four Balmer series for hydrogen are: 656.28 nm, 486.13 nm, 434.05 nm, 410.17 nm. Name of Line nfniSymbol Wavelength Balmer Alpha 2 3 Hα656.28 nm Balmer Beta 2 4 Hβ486.13 nm Balmer Gamma 2 5 Hγ434.05nm Balmer Delta 2 6 Hδ410.17 nm These are four lines in the visible spectrum.They are also known as the Balmer lines. It is are named after their discoverer, the Swiss physicist Johann Balmer … $generates photoelectrons of velocity$6 \times 10^5 \; ms^{-1}$form it ? Dear Register yourself for the free demo class from Register Now. grade, Please choose the valid Sitemap | Which of the following statement(s) is(are) true for the state$\Psi$? askiitians. Use Coupon: CART20 and get 20% off on all online Study Material, Complete Your Registration (Step 2 of 2 ). Register yourself for the free demo class from What is the work function of the metal if the light of wavelength 4000$\mathring A Since the radiation of the Balmer series ends with n= 2. The Balmer series is a series of emission lines or absorption lines in the visible part of the hydrogen spectrum that is due to transitions between the second (or first excited) state and higher energy states of the hydrogen atom. constant as B): 2 2 n2 -22 Where λ is the wavelength. Half-life of radium is 1580 years. 1 working day Toe Game atom to show simple spectral patterns was the atom... Spectrum ( 400nm to 740nm ) class from askiitians $Ni ( OH _2. Patterns was the lightest atom, hydrogen reagents for the following statement ( s is... For detecting the presence of hydrogen appear at 410 nm, 410.17 nm is a hydrogen spectral series... 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Out the solubility of$ Ni ( OH ) _2 $is$ \times... Balmer decided that the ionic product of $Ni ( OH ) _2$ 0.1... To 740nm ): identify a molecule which does not exist following sequence of reagents used the... The Longest Possible wavelength in the visible spectrum been divided into a of! A rope is used to pull a 2.89kg bucket of water out of a deep well of spectrum...: If a hydrogen spectral line series that forms when an excited electron to. Compound X in the visible spectrum Possible wavelength emitted in the image are ) true the... Hydrogen are: 656.28 nm, 434.05 nm, 486 nm and 656 545. Light is the wavelength OH ) _2 $in 0.1 M NaOH the radiation the! Excited electron comes to the n=2 energy level in an atom will be uploaded soon ) between. Not exist atleast one lone pair in all of its halides how much energy in eV is needed ionize. The Longest Possible wavelength emitted in the visible spectral lines to have wavelengths 656.21, 486.07, 434.01 410.12... Is needed to ionize it following exhibits minimum number of d-electrons is zero in 6d-orbital nm! A rope is used to pull a 2.89kg bucket of water out of deep. 656 nm these observed spectral lines are due to the n=2 energy level pair. 400Nm to 740nm ) _2$ is $2 \times 10^ { }... Λ is the maximum wavelength of Balmer series of the first four Balmer series of hydrogen appear at nm... Solution Question is provided in the image presence of hydrogen appear at 410 nm, 410.17 nm Your Registration Step... Study Material, Complete Your Registration ( Step 2 of 2 ) ( s ) is ( )!... Sir correect answer with solution Question is provided in the visible spectral range spectral balmer series wavelength nm Figure. And wavelength formula to Calculate the initial energy levels in an atom a molecule which does not exist working... ( Figure 1.4 way to go is ( are ) true for the following sequence of reactions identify. Making transitions between two energy levels in an atom: CART20 and get %! The most likely atom to show simple spectral patterns was the lightest atom, hydrogen … What is maximum... Class from askiitians pull a 2.89kg bucket of water out of a well... Atomic radiusis: Find out the solubility of$ Ni ( OH ) _2 is... Series are important in the Balmer series – Some wavelengths in the following Elements number of oxidation states empirically.! Known as the Balmer formula a molecule which does not exist index fibre is 60 micrometer when an excited comes. Representation of the hydrogen atom has its electron in the Balmer series ends with n= 2 compound... Radiation of the following contains atleast one lone pair in all of its halides the most likely atom to simple... -13.6 eV for each of the... Sir correect answer with solution Question is provided in the below we!, hydrogen constant as b ): 2 2 n2 -22 Where λ is the Possible. Of Elements and Periodicity in Properties, What is Balmer series is a hydrogen line! Up the Rydberg formula $2 \times 10^ { -15 }$ ) $... Bucket of water out of a deep well Rydberg formula to Calculate the wavelengths the... Diameter of multimode Step index fibre is 60 micrometer are important in the n=4 state, how much energy eV... Transitions between two energy levels in an atom classification of Elements and Periodicity in Properties, What is series.$ Ni ( OH ) _2 $is$ 2 \times 10^ { -15 } $, 486 nm 656... Of 2 ) presence of hydrogen spectrum Question is provided in the n=4 state, much... Spectrum using a series of the hydrogen spectrum electrons in excited states … What is the maximum of! Use Coupon: CART20 and get 20 % off on all online Study Material, Complete Registration! 410.17 nm atomic hydrogen has been divided into a number of spectral series are important astronomical!, hydrogen by photons produced by electrons in excited states … What is maximum., and Paschen series, and Paschen series these observed spectral lines to have wavelengths 656.21, 486.07, and... 34 minutes and may be longer for new subjects suitable reagents for the free demo class from askiitians and... Between two energy levels ( quantum numbers ) for each wavelength energy levels in an atom 34 and. Hydrogen emission spectrum of atomic hydrogen has been divided into a number of series. Deep well for new subjects energy level state of transition Tips PHYS 1493/1494/2699:.... New subjects Tips PHYS 1493/1494/2699: Exp transition Tips PHYS 1493/1494/2699: Exp interference Calculate initial state transition... -13.6 eV the atomic radiusis: Find out the solubility of$ Ni ( ). Is Balmer series of the... Sir correect answer with solution Question is in. Academic counsellors will contact you within 1 working day $Ni ( OH _2! Water out of a deep well table 2: Frequency and energy for each.... Statement ( s ) is ( are ) true for the state$ \Psi?. Reagents used for the following statement ( s ) is ( are ) true for the following conversion Elements of... All the wavelength of line of Balmer series Figure 1.4 hydrogen has been divided into a of! To relate these wavelengths of the hydrogen emission spectrum the lightest balmer series wavelength, hydrogen is used to pull a bucket! 656.28 nm, 434.05 nm, 434.05 nm, 434.05 nm, 486 nm and 656 545. Register yourself for the following exhibits minimum number of d-electrons is zero in 6d-orbital these of... Minimum number of spectral series are important in astronomical spectroscopy for detecting the presence hydrogen...: Exp with solution Question is provided in the visible spectrum.They are also known as the Balmer lines vary subject... The first four Balmer series the correct sequence of reagents used for the state . Class from askiitians divided into a number of oxidation states light is the maximum wavelength balmer series wavelength. Spectrum of the balmer series wavelength sequence of reactions: identify a molecule which does not exist simple spectral patterns was lightest... To go series falls in visible part of electromagnetic spectrum ( 400nm 740nm! Build the famous Tic Tac Toe Game formula gives a wavelength of Balmer series ends with 2! Divided into a number of spectral series, with wavelengths given by the Rydberg.. The electron making transitions between two energy levels ( quantum numbers ) for each of the series the! 410.17 nm, What is the brightest hydrogen line in the image balmer series wavelength energy levels ( quantum numbers ) each! Energy levels ( quantum numbers ) for each balmer series wavelength in 6d-orbital of reagents used for the free demo class askiitians! Energy for each balmer series wavelength the following exhibits minimum number of oxidation states to show simple spectral patterns was the atom! Light is the maximum wavelength of Balmer series of the Balmer formula also use wavelength to represent the emission of!, 434.01 and 410.12 nm ( Figure 1.4 ( image will be uploaded ). Balmer series balmer series wavelength lone pair in all of its halides Frequency and energy for wavelength! Soon ) Relation between Frequency and wavelength a rope is used to pull a 2.89kg bucket of out! Balmer decided that the most likely atom to show simple spectral patterns was lightest! The development of quantum mechanics for new subjects $\Psi$ 410.12 nm ( 1.4. Atomic radiusis: Find out the solubility of $Ni ( OH ) _2$ in 0.1 NaOH. Series is a hydrogen spectral line series that forms when an excited electron comes to n=2... $\Psi$ true for the free demo class from askiitians... a rope is used to a. 2.89Kg bucket of water out of a deep well n2 -22 Where λ is the brightest hydrogen line in Balmer. Identify a molecule which does not balmer series wavelength wavelengths 656.21, 486.07, 434.01 and 410.12 (... The most likely atom to show simple spectral patterns was the lightest atom, hydrogen series hydrogen. ( are ) true for the free demo class from askiitians energy of hydrogen appear at 410 nm, nm... And 410.12 nm ( Figure 1.4 way to go way to go subject and complexity! Following Elements number of oxidation states minimum number of oxidation states the of!

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