This variation can be approximately modeled using the barometric formula.
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Air density increases with decreasing altitude, at about 1 % per ( see barometric formula ).
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The barometric formula depends only on the height of the fluid chamber, and not on its width or length.
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The Barometric formula article suggests the air density near the Earth's surface is 1.225 kg / m 3.
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The barometric formula says that the density of the air in the well will equal the density of liquid air at a depth of only about 55km.
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In physics, if you observe a gas at a fixed temperature and pressure in a uniform gravitational field, the heights of the various molecules also follow an approximate exponential distribution, known as the Barometric formula.
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The word " variation " does not occur on barometric formula and that page is not included in Wikipedia's search on atmospheric pressure variation law . " talk ) 15 : 30, 3 June 2009 ( UTC)
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The "'barometric formula "', sometimes called the " atmosphere " or " isothermal atmosphere ", is a formula used to model how the pressure ( or density ) of the air changes with altitude.
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