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At 20 deg C an alum ring has an inner diameter of 5.000 cm and a brass rod has a diameter of 5.050 cm. (a) if only the ring is heated, what temp must it reach so that it will just slip over the rod? (b) WHAT IF? What if both are heated together, what temperature must they both reach so that the ring just slips over the rod? Would this latter process work? [coefficient of linear exp for alum is 2.4 e-5, for brass it's 2.0 e-5]

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