Question: A brass rod has a circular cross-section of radius 5.00 cm. The rod fits into a circular hole in a copper sheet with a clearance

A brass rod has a circular cross-section of radius 5.00 cm. The rod fits into a circular hole in a copper sheet with a clearance of 0.010 mm completely around it when both the rod and the sheet are at 20 °C.
(a) At what temperature will the clearance be zero?
(b) Would such a tight fit be possible if the sheet were brass and the rod were copper?

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