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Atmospheric pressure


Atmospheric pressure, sometimes also called barometric pressure, is the pressure exerted by the weight of air in the ...

STP - Standard Temperature and Pressure & NTP - Normal ...


Since temperature and air pressure vary from place to place it is necessary with a standard reference condition to compare testing and documentation of ...

atmospheric pressure | Britannica.com


Aug 7, 2014 ... Atmospheric pressure can be measured with a mercury barometer ... per square centimetre, 1,013.25 millibars, one standard atmosphere, ...

atmospheric pressure - National Geographic Society


May 14, 2011 ... (atm) unit of measurement equal to air pressure at sea level, about 14.7 pounds per square inch. Also called standard atmospheric pressure.

Understanding air pressure - USATODAY.com


Air pressure is related to its density, which is related to the air's temperature and height ... The standard atmosphere is a table giving values of air pressure, ...

NWS JetStream - Air Pressure


Air pressure can be increased (or decreased) one of two ways. First, simply ... At sea level, standard air pressure is 29.92 inches of mercury. Millibars comes ...

Earth Atmosphere Model - Metric Units - NASA


The air density depends on both the temperature and the pressure through the ... To help aircraft designers, it is useful to define a standard atmosphere model of ...

Atmospheric Pressure: Definition & Facts - Live Science


Aug 29, 2013 ... Atmospheric pressure is the force exerted against a surface by the weight of the air above the surface.

What is a pressure unit "atmosphere" (atm)


An atmosphere (atm) is a unit of pressure based on the average atmospheric pressure at sea level. The actual atmospheric pressure depends on many ...

Atmospheric pressure | Define Atmospheric pressure at Dictionary.com


a value of standard or normal atmospheric pressure, equivalent to the pressure exerted by a column of mercury 29.92 inches (760 mm) high, or 1013 millibars ...

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Atmospheric Pressure - HyperPhysics


The system is said to have a positive gauge pressure exerted by the air supply. ... The standard atmospheric pressure is measured in various units: ...

1976 Standard Atmosphere Calculator - DigitalDutch.com


The online 1976 standard atmosphere calculator computes atmospheric properties like density, temperature, pressure and speed of sound up to 86 kilometers ...

Atmospheric pressure - Units of Measurement Wiki - Wikia


Atmospheric pressure is the pressure above any area in the Earth's atmosphere caused by the weight of air. Standard atmospheric pressure (atm) is discussed ...