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Learn about the definition, mechanism, and variation of atmospheric pressure on Earth. Find out the standard unit, mean sea-level pressure, and surface pressure, and how they relate to altitude and weather.
The standard atmosphere (atm) is a unit of pressure defined as 101 325 Pa, approximately equal to Earth's average atmospheric pressure at sea level. Learn about its history, conversions, and applications in physics and chemistry.
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.
17 Ιουλ 2024 · Learn what standard atmosphere is, how to calculate it, and why it is important for various fields. Find out the physical properties, layers, and applications of the standard atmosphere model.
Learn what a standard atmosphere (atm) is and how it relates to pressure, temperature and gases. Find out the conversion and the SI unit of pressure.
Standard atmosphere, unit of pressure, equal to the mean atmospheric pressure at sea level. It corresponds to the pressure exerted by a vertical column of mercury (as in a barometer) 760 mm (29.9213 inches) high.
