# Physics

A steel section of the Alaskan pipeline had a length of 65 m and a temperature of 16°C when it was installed. What is its change in length when the temperature drops to a frigid -39°C?

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1. do this the same way as the baseball bat

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posted by Damon
2. I did I multiply by the coefficent of steel which is 12*10^-6 and the chang e in temp. which is 16--39 got 55 but I'm getting the wrong answer.

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posted by Happy
3. delta L/L = alpha (-39 -16)
delta L/65 = 12*10^-6 * 55
delta L = 43900 * 10^-6 = .0439

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posted by Damon
4. Oh, remember it shrunk. It is -.0439

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posted by Damon

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