Some solar-heated homes use large beds of rocks to store heat.
(a) How much heat is absorbed by 100.0 kg of rocks if their temperature increases by 12°C? (Assume that c = 0.82 J/g · °C.)
(b) Assume that the rock pile has total surface area 2 m2. At maximum intensity near the earth’s surface, solar power is about 170 watts/m2. (1 watt = 1 J/s.) How many minutes will it take for solar power to produce the 12°C increase in part (a)?
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