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Question

Name two factors on which the heat energy liberated by a body depend.

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Solution

Heat energy by a body depends on the surface area of the body A as well as the temperature of body T.
According to Stefan's law, rate of heat energy radiated by a body is given by P=σAeT4
Thus more is the temperature of body, more is the heat radiated. Also mores is the surface area of body, more is the heat radiated.

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