A cloud weighs 500 t

Science Illustrated - - MYTHS -

Clouds fly with the wind, but they are not by any means weight­less – 1 cm3 con­tains about 0.5 g of vapour. Hence, the to­tal mass of even a small al­tocu­mu­lus cloud is close to 500 t. The rea­son why the clouds are still "fly­ing" is that they are lighter than the air be­low them, just like a ship is lighter than the wa­ter be­low it.

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