Compressibility

Compressibility is the measure of the change in volume a substance undertaken whenever a pressure is applied on the substance. Liquids are usually considered to be incompressible. For illustration, a pressure of 16,400 psig will cause a specified volume of water to reduce by only 5% from its volume at atmospheric pressure. The gases on other hand, are very compressible. The volume of a gas can be eagerly changed by applying an external pressure on the gas.