A U.S. penny has a diameter of 1.9000 cm
at 20.0 ∘C
. The coin is made of a metal alloy (mostly zinc) for which the coefficient of linear expansion is 2.6×10−5K−1
.

For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Length change due to temperature change. What would its diameter be on a hot day in Death Valley (49 ∘C )? On a cold night in the mountains of Greenland (-51 ∘C
)?