Question

When a fluid is subjected to resistance, it undergoes a volumetric change due to __________

(a) Strain

(b) Cohesion

(c) Adhesion

(d) Compressibility

I got this question during an interview.

My question comes from Newton’s Second Law in portion Fluid Dynamics of Fluid Mechanics

Answer 1

Right answer is (d) Compressibility

To elaborate: Compressibility is defined as a measure of relative change in volume of a fluid. In fluid mechanics, it is also called as isothermal compressibility due to increase in pressure and temperature.