Question: A steel ring with a 2.5000-in. inside diameter at 20.0C is to be warmed and slipped over a brass shaft with a 2.5020-in. outside diameter

A steel ring with a 2.5000-in. inside diameter at 20.0°C is to be warmed and slipped over a brass shaft with a 2.5020-in. outside diameter at 20.0°C.
(a) To what temperature should the ring be warmed?
(b) If the ring and the shaft together are cooled by some means such as liquid air, at what temperature will the ring just slip off the shaft?

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