At 18degc a rod is exactly 20.05 cm long on a steel ruler. , Ask an Expert

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At 18°C, a rod is exactly 20.05 cm long on a steel ruler. Both the rod and the ruler are placed in an oven at 303°C, where the rod now measures 20.21 cm on the same ruler. What is the coefficient of linear expansion for the material of which the rod is made?

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