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## Pressure

The pressure corresponds to the force, which is applied vertically to the surface area. In this case, the force is relative to the pressed surface, thus, is divided by the area of the surface. Absolute pressure is assumed to be 0 bar. This, at the same time, is also the maximum (theoretically) achievable negative pressure. The atmospheric pressure at sea-level is exactly 1013 hPa. All technical measuring instruments- and values show the relative pressure. The atmospheric pressure is used as the basis.

## FA =        p

 Check your calculation!     You need help?Please enter only numbers in one field! d Diameter mm cm dm m A Area mm² cm² dm² m²
 Check your calculation!     You need help?Please enter numbers only in two of the three fields! F Force N daN kN A Area mm² cm² dm² m² p Pressure bar Places behind the comma: 2 3 4 5
 Other units: 1 bar = 10 N/cm² 1 Pascal = 1 N/m² 1 bar = 100.000 Pascal 1 bar = 1.000 Hektopascal (hPa) 1 mbar = 1 Hektopascal (hPa)

 Relative pressure Absolute pressure Negative pressure,negative excess-pressure

 At a higher altitude both air pressure and temperature drop.

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Translator: Don Leslie - Email: lesdon@t-online.de