What type of elasticity is involved in the following cases?

(a) A gas

(b) A wire pulled at its ends

(c) A liquid

(a)

Gas doesn't have any length, it possesses volume only. When the volumetric stress is applied, it will have the volumetric strain. Hence it involves the Bulk modulus of elasticity.

(b)

The wire pulled at its ends has the longitudinal strain corresponding to the longitudinal strain. The length of the wire changes. Hence it involves Young's modulus of elasticity.

(c)

A liquid will have the volumetric strain when the pressure is applied. Hence it involves the Bulk modulus of elasticity.

Elasticity

The coefficient of elasticity can be evaluated as the fraction of stress generated in the object to that of the strain developed in the object. Three types of modulus of elasticity:

• Young's modulus for linear stress and strain,

• Bulk modulus for volume stress and strain

• Rigidity modulus for shearing stress and strain.