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The human body produces about 100 W of heat. How much heat does the human body emit in an hour? Recall that an hour has 3600 seconds.

a) 36 kJ
b) 100 kJ
c) 360 kJ
d) 3600 kJ

Answer :

Final answer:

The human body emits 360 kJ of heat in one hour if it produces 100 W of power, since watts can be converted to joules by multiplying by the time in seconds and an hour has 3600 seconds. The correct option is C.

Explanation:

The question requires us to calculate how much heat a human body emits in one hour if the body produces about 100 watts of power. We know that power is the rate at which work is done or energy is transferred, and it is measured in watts (W), where 1 watt is equal to 1 joule per second (1 W = 1 J/s).

To find the heat emitted in one hour, we can use the conversion factor that an hour has 3600 seconds. Since the human body produces 100 W and 1 W = 1 J/s, over one hour (3600 seconds), the heat emitted would be:

100 W × 3600 s = 360,000 J

Converting this to kilojoules (kJ), we divide by 1000, because there are 1000 joules in a kilojoule:

360,000 J ÷ 1000 =

360 kJ

Therefore, the human body would emit 360 kJ of heat in one hour.

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Rewritten by : Jeany

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