Question

What is the relation between calorie and mechanical equivalent of heat?

Answer 1

The relation between calorie and mechanical equivalent of heat is

1 cal = 4.1868 J

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Answer 2

Calorie is a unit of heat in the CGS system. It is defined as the amount of heat required to raise the temperature of 1 g water by 1 oC.

Specific heat capacity of a substance is defined as the heat required to rise the temperature of 1 g of the substance by 1 oC.