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How many kilocalories of heat does the operation of a 1200 W hair dryer produce each...


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

How much heat in kcal must be added to 0.5kg of water at room temperature (20°C) to raise its temperature to 50°C?

How much heat in kcal is necessary to change 500 g of ice at -15°C to water at 20°C?


A cylinder of gas is at room temperature (20°C). The air conditioner breaks down, and the temperature rises to 60°C. The new pressure of the gas relative to the initial pressure (p1

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