Atmospheric Pressure
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Atmospheric pressure is the force per unit area exerted against a surface by the weight of air above that surface in the Earth's atmosphere. In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air one square centimetre in cross-section, measured from sea level to the top of the atmosphere, has a mass of about a kilogram and a weight of 63N (and a column one square inch in cross-section would weigh about 14.7 lb). From Wikipedia under the
GNU Free Documentation License Matching Results for Atmospheric Pressure:The X-FilesFor the movie with the same name, please see The X-Files: Fight the Future. ... Weather Service last night reported atmospheric conditions in this area that ... Margaret Fuller It seems that it is madder never to abandon one's self than often to be infatuated; ... the supernatural, for I feel the pressure of hidden causes, and the presence, sometimes ... Fourth Doctor To know that the tiny pressure on my thumb, enough to break the glass, would end ... The localised condition of planetary atmospheric condensation caused a malfunction in the ... From Wikiquote under the
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