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The amount of pressure the atmosphere has varies from location to location. The internationally accepted standard atmospheric pressure is approximately 14.696 pounds per square inch (psi). This pressure is that which is measured for the altitude and location of Paris, France and is used in relevance.
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What kind of pressure does a column of air exert on the air or surface below it?
A column of air exerts atmospheric pressure on the air or surface below it. This pressure is caused by the weight of the air above pushing down on the lower air or surface.
Does warm air have more pressure than cold air?
Yes, warm air has less pressure than cold air. This is because the molecules in warm air have more energy and move faster, causing them to spread out more and exert less pressure compared to the denser, slower-moving molecules in cold air.
Does air pressure get lower or higher the farther you go up in Earth's atmosphere?
Air pressure decreases as you go higher in Earth's atmosphere. This is because there is less air above you to exert pressure downwards. At higher altitudes, the air molecules are more spread out, resulting in lower air pressure.
Does cold air exert more pressure?
It depends on the situation. In a contained vessel (eg a tyre), then hot air would exert a higher pressure. In general outside the pressure is (fairly) constant, and it is the density which changes with temperature. Imagine if this weren't true; you could have two pockets of air next to each other at different temperatures, and thus also at different pressures. In reality this leads to the pressure region expanding (and so decreasing in pressure), squashing the lower pressure region (increasing its pressure). This would continue until the pressures were the same in both regions.
Cold air exerts more blank than warm air?
Cold air exerts more pressure than warm air because it is denser due to the molecules being closer together. This increased density leads to higher air pressure.
