Atmospheric pressure


Atmospheric pressure

The book of science

Tom Sharp

Evangelista Torricelli, Blaise Pascal atmospheric sciences

Atmospheric pressure


Perfectly good logic

Torricelli was the first scientist to point out that wind is caused by differences of atmospheric pressure.

Pascal’s law applies to liquids and gases. Pressure on a fluid at any point is transmitted undiminished throughout the fluid to all constraining points. Equal areas experience equal pressure, so that the pressure transmitted to an area is proportional to the size of the area.

Otto von Guericke invented the first vacuum pump and conducted his famous Magdeburg hemispheres experiment to demonstrate the force of atmospheric pressure.

See also in The book of science:

Readings on wikipedia: