Question

What is v^2/2 in the equation for a control volume in space?

(a) Potential energy per unit mass

(b) Kinetic energy per unit mass

(c) Thermal energy per unit mass

(d) Mechanical energy per unit mass

This question was addressed to me by my school teacher while I was bunking the class.

The doubt is from Basic Equations of Compressible Flow topic in portion Compressible Flow of Fluid Mechanics

Answer 1

Correct answer is (b) Kinetic energy per unit mass

For explanation: According to the first law of thermodynamics, the equation for control volume in space is derived. v^2/2 in the equation for a control volume in space is the kinetic energy per unit mass. Therefore, option b is the right choice.