A 200-g metal container, insulated on the outside, holds 100 g of water in thermal equilibrium at
A 21-g ice cube, at the melting point, is dropped into the water, and when thermal equilibrium is reached the temperature is 15.00°C. Assume there is no heat exchange with the surroundings. For water, the specific heat is 4190 J/kg · K and the heat of fusion is 3.34 × 105 J/kg. The specific heat for the metal is closest to
A) 3850 J/kg ? K.
B) 2730 J/kg ? K.
C) 4450 J/kg ? K.
D) 4950 J/kg ? K.
E) 5450 J/kg ? K.
Answer: A
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Legend says that Archimedes, in determining whether or not the king's crown was made of pure gold, measured its volume by the water displacement method. If the density of gold is 19.3 g/cm3, and the crown's mass is 440 g, what volume would be necessary to prove that it is pure gold?
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