Pascal's law

Pascal's law (päskälz`) [for Blaise Pascal], states that pressure applied to a confined fluid at any point is transmitted undiminished throughout the fluid in all directions and acts upon every part of the confining vessel at right angles to its interior surfaces and equally upon equal areas. Practical applications of the law are seen in hydraulic machines.

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Pascal's law

 or Pascal's principle

In fluid mechanics, the statement that in a fluid at rest in a closed container, a pressure change in one part is transmitted without loss to every portion of the fluid and to the walls of the container. The principle was first stated by Blaise Pascal, who also discovered that the pressure at a point in a fluid at rest is the same in all directions, and that the pressure would be the same on all planes passing through a specific point.

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Pascal's law

A law of physics which states that a confined fluid transmits externally applied pressure uniformly in all directions. More exactly, in a static fluid, force is transmitted at the velocity of sound throughout the fluid. The force acts normal to any surface. This natural phenomenon is the basis of the pneumatic fire, balloon, hydraulic jack, and related devices. See Hydrostatics