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When you are measuring air pressure, you are measuring the force that the air is exerting outwards, on whatever you are using to compress it (since materials resist being compressed). For example, measuring the air pressure in a balloon is measuring the amount of force that the air is pushing against the material of the balloon.

This is usually expresed in Pounds per Square Inch (PSI).

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Daryl Kemmer

Lvl 13
2y ago

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