A us penny has a diameter of 19000cm at 200 c the coin is, Ask an Expert

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A U.S. penny has a diameter of 1.9000cm at 20.0 C . The coin is made of a metal alloy (mostly zinc) for which the coefficient of linear expansion is 2.6e-5 K^-1. What would its diameter be on a hot day in Death Valley ( 46 C)? On a cold night in the mountains of Greenland (-54C)?

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