Chemistry / Chem 1210 · Atom · ~20 seconds
Hydrostatic Pressure
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Hydrostatic pressure is a fluid's pressure from gravity, equal to its density times column height times gravitational acceleration.
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A taller column of the same liquid exerts proportionally more pressure at its base.
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A denser liquid needs a shorter column for the same pressure, which is why mercury barometers are far shorter than water ones.