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At the time this problem was written, the price of gold was $411 per ounce, while that of platinum was $884 an ounce. The "ounce" in this case is the troy ounce, which is equal to 31.1035 g . (The more familiar avoirdupois ounce is equal to 28.35 g.) The density of gold is 19.3 g/cm3 and that of platinum is 21.4 g/cm3.
A) If you find a spherical gold nugget worth 1.00 million dollars, what would be its diameter?
B) How much would a platinum nugget of this size be worth?
A mass hangs on the end of a massless rope. The pendulum is held horizontal and released from rest. When the mass reaches the bottom of its path it is moving at a speed v = 2.4 m/s and the tension in the rope is T = 15.1 N.
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