(a) An immersion heater utilizing 120 V can raise the temperature of a 1.00 X 102-g aluminum cup containing 350 g of water from 20.0oC to 95.0oC in 2.00 min. Find its resistance, assuming it is constant during the process. (b) A lower resistance would shorten the heating time. Discuss the practical limits to speeding the heating by lowering the resistance.
(a) An immersion heater utilizing 120 V can raise the temperature of a 1.00 X 102-g aluminum cup containing 350 g of water from 20.0oC to 95.0oC in 2.00 min. Find its resistance, assuming it is constant during the process. (b) A lower resistance would shorten the heating time. Discuss the practical limits to speeding the heating by lowering the resistance.
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(a) An immersion heater utilizing 120 V can raise the temperature of a 1.00 X 102-g aluminum cup containing 350 g of water from 20.0oC to 95.0oC in 2.00 min. Find its resistance, assuming it is constant during the process.
(b) A lower resistance would shorten the heating time. Discuss the practical limits to speeding the heating by lowering the resistance.
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