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The figure here shows four rectangular m...

The figure here shows four rectangular metal plates, with sides of , L , 2L or 3L. They are all made of the same material , and their temperature is to be increased by the same amount , Rank the plates according to the expected increase in (a) their vertical heights and (b) their areas , greatest first.

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The correct Answer is:
(a) 2 and 3 tie , then 4; (b) 3,2 then 1 and 4 tie (from Eq . 18-9 , assume that change in area is proportional to initial area)
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