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SINGLE CHOICE:17. 5kg of water at 80째C is taken in a bucket of negligible heat capacity, 15kg of water at 20째C isadded to it. What is the temperature of the mixture?1) 45 C2) 65 째C3) 85 C4) 35 째C |
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Answer» Energy Lost by the hot water=Energy Gain by the cold waterLet temperature of mixture be tThen, 5(80-t) = 15(t - 20)400-5t = 15t - 30020t = 700t = 35 |
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