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A metal tube & a rod of same distan...

A metal tube & a rod of same distance same material & same outer diameter are given same amount of heat. Which will show less expansion & why ?

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(i) For a metal tube & a rod same length same material & same outer diameter the mass of rod is more than that of tube.
(ii) When same amount of heat is given to metal tube & rod then the temp rise for rod less hence expansion for rod is less than that of tube.
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