physics
posted by Rayler .
A material of unknown composition with an initial length of 2.9 m is found to expand by 0.37 mm when it is heated by 15 K. What is the coefficient of thermal expansion of this material? K1

physics 
drwls
(0.37 mm)/[(2900 mm)*15K] = 8.5*10^6 K^1
Note that the expansion amount and the original length have to have the same dimesions. I used millimeters.
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