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Encyclopedia > Air pressure

Air pressure can refer to:


  Results from FactBites:
 
Atmospheric Pressure: The force exerted by the weight of air (604 words)
ir pressure is the force exerted on you by the weight of tiny particles of air (air molecules).
Weather forecasters measure air pressure with a barometer.
Barometers are used to measure the current air pressure at a particular location in "inches of mercury" or in "millibars" (mb).
Atmospheric Pressure (421 words)
Pressure is a force, or weight, exerted on a surface per unit area, and is measured in Pascals (Pa).
The pressure exerted by a kilogram mass on a surface equals 9.8 Pa. The pressure exerted by the whole atmosphere on the Earth’s surface is approximately 100,000 Pa. Usually, atmospheric pressure is quoted in millibars (mb).
In fact, the air moving from high to low pressure follows a spiralling route due to the rotation of the Earth beneath the moving air, which causes an apparent deflection of the wind to the right in the Northern Hemisphere, and to the left in the Southern Hemisphere.
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