Re: Are liquids compressable?

Although liquids are very SLIGHTLY compressible, especially at elevated
temperatures, the effect is considered negligible and are almost always
considered to be INCOMPRESSIBLE.  The science of HYDRAULICS is built upon
this premise.  Often, many gases are also modeled as being incompressible
for flows of engineering interest because the equations of state and
motion are more easily solved analytically with that assumption, and
because the effects of compressibility are still rather negligible until
you reach high velocities.  One can get a feel for the effect of
compressibility of a gas by solving for the compressibility factor, Z,
thus:

	Z = (pv) / (RT)

where,
	Z is the compressibility factor
	p is the absolute presure
	v is the SPECIFIC volume (V/m, where m is the mass)
	R is a gas constant
	T is the absolute temperature

If Z is near 1, then the gas can be modeled as incompressible.