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When two or more bodies at different temperatures are brought into thermal contact, then the net heat lost by the bodies is equal to the heat gained by the cold bodies until they attain thermal equilibrium. This is known as

A
Thermal equilibrium
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B
Specific heat of solid
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C
Principle of method of mixtures
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D
Calorimetry
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Solution

The correct option is C Principle of method of mixtures
When two or more bodies at different temperatures are brought into thermal contact, then the net heat lost by the bodies is equal to the heat gained by the cold bodies until they attain thermal equilibrium. This is known as Principle of Method of Mixtures.
This is applicable only when "Net heat lost = Net heat gained".

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