If air pressure is gravity pulling air down why does it also push up and to the sides?
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The molecules of a gas are moving around in random directions all the time. How fast they’re moving is related to their temperature.
Whenever a gas molecule traveling in your direction hits you and bounces off you, the gas is exerting a pressure on you. And because there are molecules moving in all directions all the time, it’s always exerting pressure in all directions.
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