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Question: are your calculated densities of the pre1982 and post1982 pennies...

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Are your calculated densities of the pre-1982 and post-1982 pennies different? Explain. Compare those densities to the densities of pure copper (8.96 g/cm) and pure zinc (7.14 g/cm). Comment on the relationship between the mint year of the penny and its density relative to the densities of pure copper and pure zinc.

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