10kg of water 80C cools faster then 15kg of water at the same temperature kept in identical vessels. Why ?
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The mass of 10 kg water is less than mass of 15 kg water. Since, the temperature and the specific heat capacities of the two are same, we can say that 10 kg water has a lower heat content (as thermal energy is directly related to the mass of a body). Due to its lower thermal content, it cools faster.
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