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- The Density of Clouds 4 answers
Clouds are made of extremely small droplets of water ranging from 1 to 100 microns. Their high surface area to volume ratio means that air resistance would greatly slow their fall.
However, regardless of a water droplets total size, water's density is still much greater than air, and over time the earth's gravitational pull should cause the water droplet to fall with respect to its surrounding gas.
Why then, do water droplets in clouds appear to float at great altitudes rather than fall to the earth? If drawing a Newton force diagram of a water droplet in a cloud, what forces pulling upwards equalize the force of gravity pulling it down?