Why do we feel comfortable when we sit under a fan after doing physical exercise
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This is due to the reason that when evaporation occurs, the liquid (sweat in this case) absorbs heat from the surroundings in order to evaporate. Thus, it takes a lot of heat from your body as well. Your skin thus becomes cool.
This happens even when the fan is switched off. But with the fan switched on, the effect can be felt in a better (and cooler!)
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Answer:
because the sweat which came from doing exercise will cool..
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