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Atmospheric pressure - Wikipedia
https://en.wikipedia.org/wiki/Atmospheric_pressure
Web ResultAtmospheric 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 …
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Atmospheric Pressure - National Geographic Society
https://www.nationalgeographic.org/encyclopedia/atmospheric-pressure/
Web ResultOct 19, 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.
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Atmospheric pressure | Definition, Measurement, & Variations
https://www.britannica.com/science/atmospheric-pressure
Web ResultMar 11, 2024 · 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.
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Atmospheric Pressure: Definition & Facts | Live Science
https://www.livescience.com/39315-atmospheric-pressure.html
Web ResultAug 29, 2013 · Enter the barometer. Atmospheric pressure is the force per unit area exerted by the weight of the atmosphere. To measure that weight, meteorologists use a barometer. It was Evangelista...
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Air Pressure | National Oceanic and Atmospheric Administration
https://www.noaa.gov/jetstream/atmosphere/air-pressure
Web ResultDec 18, 2023 · The standard pressure at sea-level is 1013.25 in both millibars (mb) and hectopascal (hPa). The number of molecules in the atmosphere decreases with height. Download Image. The atoms and molecules that make up the various layers of the atmosphere are constantly moving in random directions.
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How Is Barometric Pressure Measured and Why? | HowStuffWorks
https://science.howstuffworks.com/nature/climate-weather/meteorological-instruments/barometric-pressure.htm
Web ResultFeb 27, 2024 · Barometric pressure is a measurement of the air pressure in Earth's atmosphere. For this reason, it is also known as atmospheric pressure. The pressure is created by fluid gas molecules in the air, and it extends in all directions. Notably, it exists as downward pressure exerted on the ground on …
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气压_百度百科
https://baike.baidu.com/item/气压/385358
Web Result气压(atmospheric pressure),是作用在单位面积上的大气压力,即在数值上等于单位面积上向上延伸到大气上界的垂直空气柱所受到的重力。著名的马德堡半球实验证明了它的存在。气压的国际制单位是帕斯卡,简称帕,符号是Pa。
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大气压力(物理学名词)_百度百科
https://baike.baidu.com/item/%E5%A4%A7%E6%B0%94%E5%8E%8B%E5%8A%9B/349020
Web Result大气压力(atmospheric pressure)是地球表面覆盖有一层厚厚的由空气组成的大气层,在大气层中的物体,都要受到空气分子撞击产生的压力。 也可以认为,大气压力是大气层中的物体受大气层自身重力产生的作用于物体上的压力。
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Atmospheric Pressure | Earthdata
https://www.earthdata.nasa.gov/topics/atmosphere/atmospheric-pressure
Web ResultSep 26, 2023 · Atmospheric Pressure. Find Data. The pressure exerted by the atmosphere as a consequence of gravitational attraction exerted upon the 'column' of air lying directly above the point in question.
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Barometer - National Geographic Society
https://www.nationalgeographic.org/encyclopedia/barometer/
Web ResultOct 24, 2023 · Atmospheric pressure is an indicator of weather. Changes in the atmosphere, including changes in air pressure, affect the weather. Meteorologists use barometers to predict short-term changes in the weather. A rapid drop in atmospheric pressure means that a low-pressure system is arriving. Low …
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