1. The problem statement, all variables and given/known data A Kennedy half-dollar has a mass that is 1.150 x 10-2 kg. The coin is a mixture of silver and copper, and in water weighs 0.1011 N. Determine the mass of silver in the coin. 2. Relevant equations Explicit givens: m = 1.150 x 10-2kg apparent weight = 0.1011N Implicit givens: density of water = 1 x 103kg/m3 density of copper = 8890 kg/m3 density of silver = 10500 kg/m3 Fg = mg FB = pwatergV 3. The attempt at a solution Since the apparent weight is given (0.1011N). the actual weight should be defined using: Fg = 0.1011 + FB (Buoyancy force) Fg = 0.1011 + pwatergV the mass of the coin should be the sum of the mass of silver and copper therefore: m = msilver + mcopper m = msilver + pcopperV I isolated for V since it is an unknown variable in both equations V = (m - msilver)/pcopper After substituting V and I solved for msilver and got 9.77 x 10-4kg however the answer which is provided to me is 6.3 x 10-3kg I don't understand what I did wrong for this question! I've triple checked my work, may someone please point out where I have made a mistake?