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In the physical sciences, Pascal's law or Pascal's principle states that for all points at the same absolute height in a connected body of an incompressible fluid at rest, the fluid pressure is the same, even if additional pressure is applied on the fluid at some place.
Additional recommended knowledge
The difference of pressure due to a difference in elevation within a fluid column is given by:
where, using SI units,
ΔP is the hydrostatic pressure (in pascals), or the difference in pressure at two points within a fluid column, due to the weight of the fluid;
ρ is the fluid density (in kilograms per cubic meter);
g is sea level acceleration due to Earth's gravity (in meters per second squared);
Δh is the height of fluid above (in meters), or the difference in elevation between the two points within the fluid column.
The intuitive explanation of this formula is that the change in pressure between two elevations is due to the weight of the fluid between the elevations.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Pascal's_law". A list of authors is available in Wikipedia.|