Question

The physical principle behind the energy equation is _____________

(a) Newton’s second law of motion

(b) Zeroth law of thermodynamics

(c) First law of thermodynamics

(d) Newton’s first law of motion

The question was asked in an online quiz.

This interesting question is from Energy Equation topic in section Governing Equations of Fluid Dynamics of Computational Fluid Dynamics

Answer 1

The correct answer is (c) First law of thermodynamics

Easiest explanation: First law of thermodynamics is the physical principle behind the energy equation. This law states that “Energy can neither be produced nor be destroyed but can be converted from one form into another”.