(orchestra music)
- Hey there, I'm Josh Clark
and this is Brain Stuff
and you're about to learn some stuff.
Have you ever thought, wait a minute,
I love balloons, I love how they float,
but there is a way to make an even better,
possibly perfect balloon?
Yes there is.
So consider this.
At sea level, a liter of air
weighs about 1.25 grams.
It has weight believe it or not.
Helium is lighter than air.
It weighs about .18 grams.
There's more than a gram difference,
which means that if you
have a liter of helium
say in a balloon, it's
going to float at sea level
because it's lighter than air.
But .18 grams, we can do
better than that, right?
That's still kinda heavy.
Yes we can do better.
It's called a vacuum.
A vacuum is definitely lighter than air.
It weighs zero grams.
You could conceivably construct a balloon,
an airship, anything you
wanted to float indefinitely
out of any material whatsoever.
Even something like iron.
If you made it big enough
and removed all of the air
inside, it would float.
So there is such a thing
as a perfect balloon.
It's called a vacuum ballon.
The problem is, nature abhors a vacuum,
so it's gonna be trying to
leak and sink your balloon
and wreck your dreams in general.
But you can insert some
sort of mechanism in there
and pump the air out
and your vacuum balloon
can just keep going indefinitely.
You can beat nature basically
as much as it hates vacuums,
you can keep a vacuum in order
if you know what you're doing.
So I guess go out there,
take this brain stuff
as a means of inspiration.
Go construct an iron airship
that's powered by a vacuum.
And if you like this video,
check out all the other ones.
We're all over this You-Tube channel.
Subscribe, like us.
If you have a question you want answered
leave it in the comment section.
Hopefully we can check it
out and maybe answer it.
