A fan feels cooling in summer. Meena says the fan makes the room's air colder
A fan feels cooling in summer. Meena says the fan makes the room's air colder. Her brother says the air stays just as hot — something else is being cooled. Who is right?
Who do you think is right? Pick one.
The answer: Her brother is right
Why
Meena's feeling is real — a fan genuinely makes you feel cooler, so it's natural to think it chills the air. But a fan has no cooling part; a thermometer in the room reads the same with it on or off. What it does is move air. Your skin is always damp with a little sweat, and moving air carries that moisture away faster; losing that water takes heat from your skin, so YOU cool down, not the air. Test: wet the back of your hand and wave it — that patch feels cold, while a dry patch doesn't. Her brother is right: the fan cools you by speeding sweat's evaporation, the air stays just as warm.
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