Question

What is meant by mechanical equivalent of heat?

Answer 1

In the case of the mechanical equivalent of heat motion and heat are mutually interchangeable and that in every situation, a given amount of work would generate the same amount of heat, provided the work done is totally converted to heat energy.

The mechanical equivalent of heat is given as,

$J=\frac{W}{Q}$

Where, the amount of work expended in the production of heat is $W$ and the amount of heat is $Q$.