Clouds Weighing 500,000kg - How Do They Float?

Clouds can weigh up to 500,000kg, and yet they float in the air like they weigh nothing. How is this possible? It turns out, the answer lies in a kettle and a couple of glasses of water.

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[marshallsweatherhiking]

This would be even better if you included an explanation of how terminal fall speed works. It turns out that the drag force on a uniformly dense spherical object is roughly proportional to cross-section area times the velocity squared while the gravitational force is proportional to the volume. This gives a rough formula where the terminal fall speed of a very small drop can be shown to be less than a centimeter per second.

Also, stratus clouds can exist even with zero updraft. They don’t fall far because they evaporate when they fall into warmer air below. If there is a temperature inversion where the layer below the stratus is cooler than the layer above, they can persist for a very long time. Also, fog does actually slowly fall and accumulates on the ground. Its just at an extremely slow rate compared to rain.

[MarkNuuuuuutt]

Nice video! You explain things very well