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Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa), which is equivalent to 1,013.25 millibars, [1] 760 mm Hg, 29.9212 inches Hg, or 14.696 psi. [2]
Atmospheric pressure is the force per unit area exerted by a body of air above a specified area (called an atmospheric column). It is expressed in several different systems of units, including millimeters (or inches) of mercury, pounds per square inch (psi), millibars (mb), or standard atmospheres.
19 Οκτ 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.
29 Μαΐ 2024 · Atmospheric pressure is the force per unit area exerted by the weight of the atmosphere above a particular point on Earth. Essentially, it’s the weight of the air molecules pressing down on the Earth and everything on its surface.
29 Αυγ 2013 · Atmospheric pressure is the force exerted against a surface by the weight of the air above the surface.
Atmospheric Pressure. The pressure exerted by the atmosphere as a consequence of gravitational. attraction exerted upon the 'column' of air lying directly above the point.
Atmospheric pressure or barometric pressure is the pressure within the atmosphere of Earth. For most purposes it can be approximated by the hydrostatic pressure exerted by the weight of the air above a surface.
