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प्रश्न
A body radiates out 300 calories of heat energy. How much heat energy is radiated out by the body in joules?
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उत्तर
Heat energy radiated by the body = Q = 300 Cal
As 1 cal = 4.2 J
Q = 300 Cal = 300 × 4.2 J
Q = 1260 J
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