how does a running fun help to dry up the floor after mopping
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Water evaporates at a rate proportional to the water content of the air around it. As more water evaporates, the water content of the surrounding air rises and the rate of evaporation slows down.
Placing a fan near the site of evaporation moves the air away after it's taken up a little of the water and replaces it with air that has a lower water content. As the water will evaporate quicker into the ‘new’ air, the whole process speeds up.
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