Homework Help: Physics

Posted by Happy on Sunday, April 6, 2008 at 9:47am.

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?

Physics - Damon, Sunday, April 6, 2008 at 10:34am
do this the same way as the baseball bat
- Physics - Happy, Sunday, April 6, 2008 at 12:19pm
  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.
Physics - Damon, Sunday, April 6, 2008 at 2:20pm
delta L/L = alpha (-39 -16)
delta L/65 = 12*10^-6 * 55
delta L = 43900 * 10^-6 = .0439
- Physics - Damon, Sunday, April 6, 2008 at 2:21pm
  Oh, remember it shrunk. It is -.0439

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