Question

about compressibility

Answer 1

Compressibility is the measure of how much a given volume of matter decreases when placed under pressure. If we put pressure on a solid or a liquid, there is essentially no change in volume. The molecules that make up the solid or liquid are very close together. There is no space between the individual particles, so they cannot pack together.

Gases are compressible because most of the volume of a gas is composed of the large amounts of empty space between the gas particles. When a gas is compressed, the gas particles are forced closer together.