let us discuss about the topic of fluids.
regarding fluid the very first thing which
we can write to define it is . substances.
which do not have . definite shape, but . have.
definite volume.
are called.
fluids. in fluids generally we keep.
liquid and gaseous substances. because solids
have a definite shape also. and not all gases
are consider in the category of fluids. because
as we have taken . fluids have definite volume,
definite volume, means these are having almost.
constant density also.
because if density is not constant . volume
will also not be constant.
so when a gas is having, expendable or compressible
nature, in that condition its volume will
also not be a constant so such gases are not
considered as fluids.
those gases which are in iquilibrium or even
in there flowing state.
if we consider there density is not varying
then such gases can be considered under the
category of fluids. about fluids one more
point which is quite important , to keep in
mind is.
a given amount of fluid. is always.
separated by an interface.
from.
other solids. or gaseous media, may be other
liquids of fluids also. and the simplest example
to understand an interface of, of fluid is.
say if we consider . liquid is taken in a
container.
this say a glass container in which a liquid
is filled.
in this situation we can say, the liquid is
having six interfaces.
out of which the one interface is contact
with air which can be taken as gas. and all
other five interfaces are, in contact with
the solid.
or this is the solid which , of which the
container is made-up of. and you can say these
are all the interfaces through which, the
liquid is separated from other gas or solid
media.
so these are interfaces . which separate fluid
from either a gaseous media or a solid media.
another important point we can write about
a fluid is . the fluid interface.
bounded. by a gas is called.
free surface.
of the fluid.
like in the situation this is the free surface
of , fluid.
which is in contact with the gas. and in coming
sections we are going to discuss about lot
many important.
facts regarding fluids like pressure due to
fluid and the behavior of fluid, for external
forces and, many other different situations.
lets continue with , other sections of the
topic of fluids.
