Ten Meter Long Steel Railroad Rails Are Laid End to End

question 29

Short Answer

Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115.°F. Six months later the temperature has dropped to -2.°F. How much space now exists between each rail?
[ linear expansion coef. for steel is 12. × 10^-6 C°^-1]

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