atmospheric pressure

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Related to atmospheric pressure: barometric pressure, Absolute pressure, Gauge pressure

atmospheric pressure

Pressure caused by the weight of the atmosphere. It has a mean value of one atmosphere at sea level but reduces with increasing altitude. Also called barometric pressure.

atmospheric pressure

(General Physics) the pressure exerted by the atmosphere at the earth's surface. It has an average value of 1 atmosphere

at′mospher′ic pres′sure

1. the pressure exerted by the earth's atmosphere at any given point.
2. a value of standard or normal atmospheric pressure, equivalent to the pressure exerted by a column of mercury 29.92 in. (760 mm) high, or 1013 millibars (101.3 kilopascals). Also called barometric pressure.

at·mos·pher·ic pressure

Pressure caused by the weight of the air. At sea level it has an average value of one atmosphere and gradually decreases as the altitude increases.
Did You Know? The atmosphere that blankets the Earth gently presses down on us, and the subtle variations in this atmospheric pressure greatly affect the weather. For example, forecasters often talk of low pressure bringing rain. In areas of low air pressure, the air is less dense and relatively warm, which causes it to rise. The expanding and rising air naturally cools and the water vapor in the air condenses, forming clouds and the drops that fall as rain. In high pressure regions, on the other hand, the air is dense and relatively cool, which causes it to sink. The water vapor in the sinking air does not condense, leaving the skies sunny and clear. So if you're trying to hit a home run, would you prefer a beautiful, sunny day or one in which it looks like rain? On the overcast day, the ball has less air to push aside on its way out of the ballpark, making it easier to hit a homer.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atmospheric pressure - the pressure exerted by the atmosphereatmospheric pressure - the pressure exerted by the atmosphere
gas pressure - the pressure exerted by a gas
barometric pressure - atmospheric pressure as indicated by a barometer
compartment pressure - the air pressure maintained in an air-tight compartment (as in an aircraft)
overpressure - a transient air pressure greater than the surrounding atmospheric pressure; "the overpressure of the blast kills by lethal concussion"
sea-level pressure - the atmospheric pressure reduced by a formula to the pressure at sea level
References in classic literature ?
About 6,500; and as in reality the atmospheric pressure is about 15 lb.
such discourse we had, hermit and philosopher, and the old settler I have spoken of -- we three -- it expanded and racked my little house; I should not dare to say how many pounds' weight there was above the atmospheric pressure on every circular inch; it opened its seams so that they had to be calked with much dulness thereafter to stop the consequent leak; -- but I had enough of that kind of oakum already picked.
Keywords Atmospheric pressure plasma jet, DBD, Coatings, Surface modification, Biomedical treatment
KEY WORDS: Atmospheric Pressure Hemoptysis Humidity Outdoor Temperature.
The scientists found that the craters were formed when Mars had an atmospheric pressure of up to 0.
We found that as atmospheric pressure in New Jersey fell the number of photos taken rose and as atmospheric pressure climbed again the number of photos taken fell.
The topics include treating polymer surfaces with surface dielectric barrier discharge plasmas, depositing nanosilica coatings on plasma-activated polyethylene films, surface treatment by dielectric barrier discharge for enhanced polymer-polymer and metal-polymer adhesion, improving the adhesion of polypropylene through aerosol assisted plasma deposition at atmospheric pressure, and atmospheric plasma treatment in extrusion coating.
A wide range of measurements can be performed by using the Pirani gauge (SPU) if a low vacuum range measurement is required, or connect the Atmospheric sensor (SAU) if you would like to precisely measure atmospheric pressure.
The Norcross MXBOC Viscosity Sensor is suitable for water and solvent based applications with tanks between 7" and 26" deep and operates at atmospheric pressure, featuring a new one-bolt mounting mechanism, the all stainless Steel wetted parts can be easily removed for cleaning and sterilization without having to disturb the air or electrical connections.
Met Office weather station data from 1981 to 2001 was used to look at variations in atmospheric pressure.
The inlet system accomplishes this by injecting particulate ions at atmospheric pressure into vacuum and trapping them to remove any expansion-induced kinetic energy.

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