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PRESSURE is a force exerted by the substance per unit area on another substance. The pressure of a gas is the force that the gas exerts on the walls of its container. When you blow air into a balloon, the balloon expands because the pressure of air molecules is greater on the inside of the balloon than the outside.
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www.elmhurst.edu/~chm/vchembook/180pressure.html
www.elmhurst.edu/~chm/vchembook/180pressure.html
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Figure 1: The internal gas pressure in a balloon, PB, is given by the impacts of moving gas molecules, as they collide with the skin of the balloon from the inside. ... The direction of this gas pressure force is always perpendicular to the surface of the enclosure at every point.
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www.indiana.edu/~geog109/topics/10_Forces&Winds/GasPres...
www.indiana.edu/~geog109/topics/10_Forces&Winds/GasPressWeb/PressGasLaws.html
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Partial pressure - Wikipedia, the free encyclopedia
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In a mixture of ideal gases, each gas has a partial pressure which is the pressure which the gas would have if it alone occupied the volume. The total pressure of a gas mixture is the sum of the par...
en.wikipedia.org/wiki/Partial_pressure
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Gas flowing from higher to lower pressure is the fundamental principle of the natural gas delivery system. The amount of pressure in a pipeline is measured in pounds per square inch. From the well, the natural gas goes into "gathering" lines, which ... From the well, the natural gas goes into "gathering" lines,
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www.aga.org/Kc/aboutnaturalgas/consumerinfo/NGDeliveryS...
www.aga.org/Kc/aboutnaturalgas/consumerinfo/NGDeliverySystem.htm
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Pressure - Wikipedia, the free encyclopedia
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Pressure (symbol: p or P ) is the force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure is the pressure relative to the local atmospheric or ambie...
en.wikipedia.org/wiki/Pressure
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In this series of experiments, you will control the action of a piston in a pressure chamber which is filled with an ideal gas. The gas is defined by four states:
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jersey.uoregon.edu/vlab/Piston/index.html
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Although we can’t see any physical evidence of how a gas can exert a pressure, we certainly can feel that pressure. To understand how a gas exerts pressure we need to recall the underlying atomic model: a gas is a bunch ... There are several ways that gas pressure can be increased due to increased frequency of impacts.
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chemsite.lsrhs.net/AtomsInMotion/GasPressure.html
chemsite.lsrhs.net/AtomsInMotion/GasPressure.html
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President Bush on Tuesday halted the purchase of crude oil until the fall for the government’s emergency reserve. The move came as political pressure mounted to address gasoline prices. ... President, under pressure on gas prices, also calls for environmental easing...
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www.msnbc.msn.com/id/12469582/
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