Question

What is compressibility?
What do you mean by negligible compressibility?

Answer 1

What is compressibility?

In thermodynamics and fluid mechanics, compressibility is a measure of the relative volume change of a fluid or solid as a response to a pressure change. In its simple form, the compressibility β may be expressed as , where V is volume and p is pressure

What do you mean by negligible compressibility?

Compressibility : it is the ability of an object to be compressed. Thus, negligible compressibility means that the object does have the ability to compress but the compression is not significant enough to be considered.