# PHYSICS HELP

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Back in the stage coach era, iron rims were placed on wooden wheels by shrink-fitting. Suppose that the wheel has a diameter of 100.00 cm, whereas the rim has an inside diameter if 99.75 cm at 20°C. How hot must the iron rim be heated if it is to be slid over the wheel?
(Let's say the average coefficient of linear expansion for iron is 11 x 10^-6 [(° C)^-1] )

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