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A rod is measured to be exactly 24.80cm long using a steel ruler at a temperature...

A rod is measured to be exactly 24.80cm long using a steel ruler at a temperature of 24.3oC. Both the rod and the ruler are placed in an oven with a temperature of 268.0oC where the rod now measures 24.90cm using the same ruler. What is the coefficient of thermal expansion for the material of which the rod is made? In Kelvin please. This problem is using alpha for steel from Cutnell & Johnson, Table 12.1 Did you consider the fact that the ruler also changes its size?

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