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Formula Hydrostatic pressure Hydrostatic pressure    Density    Height / Depth    Gravitational acceleration

Formula: Hydrostatic pressure
Buoyant Force (Archimedes' principle)

Hydrostatic pressure

Pressure of the fluid at depth \( h \) or of the gas at height \(h\). The fluid (e.g. water) or the gas (e.g. air) exerts a certain force on a square meter.


Density of the fluid or gas on which the hydrostatic pressure \(\Pi\) acts. The denser the fluid or gas, the greater the hydrostatic pressure.

For example, the density of water is: \( 997 \, \frac{ \mathrm{kg} }{ \mathrm{m}^3 } \) and the density of ethanol: \( 789 \, \frac{ \mathrm{kg} }{ \mathrm{m}^3 } \). Thus, at the same depth \(h\), a greater hydrostatic pressure is established in water than in ethanol.

Height / Depth

In the case of fluid (e.g. water), it is the depth measured from the bottom of the sea. In the air atmosphere, for example, it is the height above the ground. In a test tube, it is the height measured from the bottom of the test tube.

Gravitational acceleration

Acceleration experienced by any body on Earth. Acceleration due to gravity has the value: \( g = 9.8 \, \frac{\mathrm m}{ \mathrm{s}^2 } \).