If air pressure is gravity pulling air down why does it also push up and to the sides?
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imagine a bunch of marbles in a cylinder… the walls of the cylinder keep them in place. Remove the cylinder and the marbles push out to the sides and it collapses.
Basically stuff is pushing down from above, so the marbles want to move to the sides to escape. But all the other marbles are trying to escape to the sides as well, this is pressure.
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