Silver Copper
August 2nd, 2011
How could I design an experiment to find out if a quarter has more silver or copper in it.?
The density of copper is 8.9 g/cm cubed, and the density of silver is 10.5 g/cm cubed. I would have to use a 1965 quarter or older.
Assuming that the quarter has only silver and cooper and no other metals
find the volume of the quarter. call it X
find the mass of the quarter. Call it Y
copper_mass + silver_mass = Y
copper_mass/8.9 + silver_mass/10.5 = X
Solve for the masses. (2 equations, 2 unknowns)
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