The theoretical density of the penny is 7.174 g/mL.
What is the theoretical density of a post-1982 penny?
The theoretical density is calculated as follows:
Density of Zinc = 7.13 g/mL
Density of Copper = 8.92 g/mL
Density of penny = percentage mass of copper + density of copper + percentage mass of Zinc + density of zinc
density of penny = 0.025 * 8.92 + 0.975 * 7.13
theoretical density of penny = 7.174 g/mL
In conclusion, the density of the penny is obtained from then percentage mass and the densities of the metal components.
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