Answer to Question #325763 in Physics for AKM

Question #325763

The steel rail road track is 20 cm long at 10 degree celsius. How much longer is the track at 20 degree celsius? The coefficient of linear expansion of steel is 1.27x10-5 -K.

Expert's answer

"\\Delta l=l_0\\alpha \\Delta T"

"\\Delta l=20\\:{\\rm cm}*1.27*10^{-5}*(20-10)\\\\\n=2.54*10^{-3}\\: \\rm cm"

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