A thin copper wire of length L increases by 1% when heated from temperature T1 to T2. what is the percentage change in area when a thin copper plate having dimensions 2l×l is heated from T1 to T2?
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Answer: Fish swim by flexing their bodies and tail back and forth. Fish stretch or expand their muscles on one side of their body, while relaxing the muscles on the other side. This motion moves them forward through the water.
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The expansions of both sheet and the wire is taking place at the same change in temperature i.e. from T1toT2. Now let us write equation 1 and substitute equation 2 and 3 in that. Hence the percentage increase in the area of the sheet is 2%.
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