1a) A copper bar is 80cm long at 15°C. What is the increase in length when it is heated to 35°C? The linear expansion coefficient for copper is 1.7×10^-5 °C^-1.
b) A cylinder of diameter 1.00cm at 30°C is to be slid into a hole in a steel plate. The hole has a diameter of 0.99970 cm at 30°C. To what temperature must the plate be heated? The coefficient of linear expansion for steel is 1.1×10^-5 °C^-1.
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