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Hot water bags are generally used for re...

Hot water bags are generally used for reducing body pain. Can they also be used to keep us warm in winter? Explain.

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The specific heat capacity of water is very high. Hence, it can lose lot of heat without much decrease in its temperature. The heat lost by water can increase the temperature of the other substances which is in contact with it. Therefore, hot water bags can used to keep out body warm in winter.
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