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Q. At 20°C, a rod is exactly 20.03 cm long on a steel ruler. Both the rod and the ruler are placed in an oven at 267°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?

Q. A car traveling at 87 km/h strikes a tree. The front of the car compresses and the driver comes to rest after traveling 0.83 m. What was the acerage acceleration of the driver during the collision? Express the answer in terms of g's, where 1g = 9.80 m/s2.

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