Temperature coefficient of expansion for aluminum, Physics

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Temperature coefficient of expansion for aluminum

At 25^oC, an aluminum ring has an inner diameter of 4 cm and a brass rod has a diameter of 4.01 cm. If the temperature coefficient of expansion for brass is 1.9 × 10^-5 (C)^-1 and the temperature coefficient of expansion for aluminum is 2.4 × 10-5 (C)^-1. To what temperature must both be heated so that the ring just slips over the rod? Answer in units of C.

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