A brass plug is to be placed in a ring made of iron at 20 c, Ask an Expert

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A brass plug is to be placed in a ring made of iron. At 20 C, the diameter of the plug is 8.852 cm and that of the inside of the ring is 8.842 cm. They must both be brought to what common temperature in order to fit? What if the plug were iron and the ring brass?

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