If the penny color is changed, will the mass change? and why?

answer:

explanation:

in 1943, the content of the coin was changed to zinc coated steel because of the copper shortage during world war ii. then after 1982, the compostion was 97.6% zinc, and 2.4% copper. so this means that the pennies made before 1982 will have a different mass from those made after 1982.

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