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A steel railroad track is 2.4 km long at 24.3°C. On a 48.1°C day, how much...

A steel railroad track is 2.4 km long at 24.3°C. On a 48.1°C day, how much longer (in meters) is it than at the previous temperature? Give answer to two decimal places.

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Answer #1

Taking the coefficient of thermal expansion of steel, (from internet)

NOTE - the answer will change if a different value of coefficient of thermal expansion of steel is taken.

Change in length due to thermal expansion is given by,

So by putting the given values we get,

Or

Or ( rounded off to two decimal places)

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