# Question

At 20.0°C, an aluminum ring has an inner diameter of 5.000 0 cm and a brass rod has a diameter of 5.050 0 cm.
(a) If only the ring is heated, what temperature must it reach so that it will just slip over the rod?
(b) What If? 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?

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