Posted by **Lina** on Sunday, February 10, 2008 at 1:06pm.

A steel beam is used in the construction of a skyscraper. By what fraction (change in L)/(Lo) does the length of the beam increase when the temperature changes from that on a cold winter day (-15 F) to that on a summer day (+105 F)?

Can anyone please give me some hints to do it?THANKS A LOT!

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