Question

3. Modern quarters are clad coins with a copper-nickel alloy sandwiching a pure copper core. The specifications for legal tender quarters established by the U. S. Mint are very exacting 1) be 8.33% Ni by mass and the balance Cu 2) weigh 5.670 g 3) have diameter of 24.26 mm 4) a thickness of 1.75 mm Each coin must: Use this information in the following problems a. Use dimensional analysis to calculate the g Ni in YOUR quarter b. Nickel metal is currently selling at $9.00/lb. Use dimensional analysis to calculate the value in dollars of the Ni in YOUR quarter c. Pick either the measured diameter or the measuredmass of your quarter and calculate the percent error between your data and the legal specifications. Why might these (diameter and mass) have different values than those specified by the Mint? Determination of the density of a quarter Data Mass of quarter 3.57 Diameter of quarter 22 cm Thickness of quarter 1.75 mm

Answer 1

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