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Die physikalische Atmosphäre ist eine nicht SI -konforme Einheit des Drucks. Seit dem 1. Januar 1978 ist sie in Deutschland keine gesetzliche Einheit mehr. Das Einheitenzeichen ist atm .
The standard atmosphere (symbol: atm) is a unit of pressure defined as 101 325 Pa. It is sometimes used as a reference pressure or standard pressure . It is approximately equal to Earth 's average atmospheric pressure at sea level .
Atmospheric pressure is caused by the gravitational attraction of the planet on the atmospheric gases above the surface and is a function of the mass of the planet, the radius of the surface, and the amount and composition of the gases and their vertical distribution in the atmosphere.
Learn about the standard atmosphere, a unit of pressure equal to the mean atmospheric pressure at sea level. Find out how it is measured, what it is equivalent to, and how it differs from zhang, an ancient Chinese measure of length.
- The Editors of Encyclopaedia Britannica
Learn about the force per unit area exerted by the air above a given area, and how it can be measured with different units and instruments. Find out how atmospheric pressure varies with altitude and affects weather patterns and human health.
- The Editors of Encyclopaedia Britannica
19. Okt. 2023 · An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). One atmosphere is 1,013 millibars, or 760 millimeters (29.92 inches) of mercury. Atmospheric pressure drops as altitude increases.
An atmosphere (or standard atmosphere) is a non-SI unit of Pressure. The symbol for atmosphere is atm. An atmosphere is equal to 101,325 newtons per square meter at sea level.
