Subject: Density of a penny
Date: Tue Dec 2 08:37:50 2008
Posted by Brian
Grade level: 7-9
School: Harris Road Middle School
City: Concord State/Province: NC
Area of science: Chemistry
The density of U.S. pennies minted after 1982 is listed as 6.94 g/cm3. These
pennies contain 97.6% Zinc and 2.4% Copper. The density of Zinc is 7.13 g/cm3
and Copper is 8.92 g/cm3. How can the density of a penny be less than either
of the two metals used to make it?
Re: Density of a penny
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