what is principal of heat exchange ?
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When hot body is kept in contact with cold body , then the quantity of heat lost by hot body is equal to the quantity of heat gained by cold body is called principal of heat exchange.
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(⌐■_■) When hot body is kept in contact with cold body , then the quantity of heat lost by hot body is equal to the quantity of heat gained by cold body is called principal of heat exchange.✨
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