Posted by **Ruby** on Sunday, February 10, 2008 at 6:06pm.

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 degree F) to that on a summer day (+ 105 degree F)?

I got 0.00144 for the answer, but it's not correct. Please give me teach me how to do this. THANKS A LOT!

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