Asked by Danny

Calculate the amount of expansion occurring when a steel rail 920.000 meters in length is heated from -10.000 to 410.000 degrees Celsius.
ANS = m
Steel = 12 * 10 ^-6
= 0.000012
Change in length
= Original length * Coefficient of linear expansion * Temperature rise.

= 920m * 0.000012 * 420
ANS = 4.636m
Please Check, Thank you.
Answered by DrBob222
It looks ok to me but I think you should round the answer to the correct number of significant figures.
Answered by Elena

ΔL = αLΔT =
=12•10⁻⁶•920•420=4.637 m
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