this post was submitted on 18 Mar 2025
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You wouldn’t be able to press a gas with your foot though.
Depends on what you mean by "press" really
Moving your foot through a gas will displace the gas, and there will be a (albiet small) pressure difference around the foot as it moves through the gas. An increase on the side in direction of movement, a decrease on the opposite side of direction of movement, and some vortices on the sides.
Basically a very poorly designed wing.
I can imagine a scenario where you a gas is encased in a volume that you can reduce by stepping on it with your foot, thus pressurizing it.
Gasoline is a liquid.
Only under certain conditions.
ok sure, but that's true for you and me as well.