why is Joule's constant named as mechenical equivalent of heat ?

Why is Joule's constant called the mechanical equivalent of heat ?

What do you mean by mechanical equivalent of heat ?

What is the value of mechanical equivalent of heat in SI ?

Define mechanical equivalent of heat. What is its value?

Let n number of little droplets of water of surface tension S dyn. Cm^-1 , all of the same radius r cm, combine to form a single drop of radius R cm. J is joule's mechanical equivalent of heat. While using CGS system of units answer the following questions. i. The energy released is

What is the value of mechanical equivalent of heat in CGS system?

The molar specific heat capacity at constant volume of a mono atomic gas is (3//2) R, where R is universal gas constant. Find the value of molar specific heat capacity of the gas at constant pressure.