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1 W = 1 J/s 4190 J = 1 kcal 1200 J/s * 1 kcal/4190 J =0.286 kcal/s =17 kcal/min. Aren't you glad you don't have to run that hair dryer by pedaling a bicycle?

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The heat produced by a 1200-W hair dryer can be converted to kilocalories by multiplying the power in watts by the conversion factor of 0.001 kcal/s per watt. Therefore, 1200 W hair dryer would produce 1.2 kilocalories of heat each second.

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Q: How many kilocalories of heat does the operation of a 1200-W hair dryer produce each second?
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