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Q. A hot (70°C) lump of metal has a mass of 250g and a specific heat of 0.25 cal/g°C. John drops the metal into a 500 g calorimeter containing 75g of water at 20°C. The calorimeter is constructed of a material that has a specific heat of 0.10 cal/g°C. When equilibrium is reached, what would be the final temperature? cwater= 1.00 cal/g°C.

Q. A particular guitar string is supposed to vibrate at 210 Hz; however it is measured to actually vibrate at 215 Hz. By what percentage must the tension in the string be changed to get the frequency to the correct value? Do not enter units.

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