Question: (a) A brass plug is to be placed in a ring made of iron. At 20oC, the diameter of the plug is 8.753cm and that

(a) A brass plug is to be placed in a ring made of iron. At 20oC, the diameter of the plug is 8.753cm and that of the inside of the ring is 8.743cm. They must both be brought to what common temperature in order to fit?
(b) What if the plug were iron and the ring brass?

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