Question

Define compressibility and give its SI unit (or) Define stress and strain and give their SI units​

Answer 1

The reciprocal of the bulk modulus is called compressibility. It is denoted by k. It is also defined as the fractional chanage in volume per unit increase in pressure.

Stress is the force acting on the unit area of a material. The effect of stress on a body is called strain. Stress can result in deformation of the body. Strain is the measurement of how much an object is stretched or deformed due to the stress developed in the object.