Yahoo Answers: Answers and Comments for Calculationheat [其他  科學]
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enUS
Fri, 12 Jan 2007 18:15:37 +0000
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Yahoo Answers: Answers and Comments for Calculationheat [其他  科學]
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https://answers.yahoo.com/question/index?qid=20070112000051KK02972
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From 天同: (c) The heat gain by the dripping water in 1 s...
https://answers.yahoo.com/question/index?qid=20070112000051KK02972
https://answers.yahoo.com/question/index?qid=20070112000051KK02972
Fri, 12 Jan 2007 22:15:47 +0000
(c) The heat gain by the dripping water in 1 sec
= (20/1000)x 4200 x T
where T is the rise in temperature of the water, and 4200 J/kgK is the specific heat capacity of water
Heat generated by the drill = 2500 x 0.6 J/s
The temperature of the block will become steady when the heat generated is all taken away by the dripping water.
i.e. 2500x0.6 = (20/1000)x 4200 x T
solving for T gets T = 17.9 deg.C