Variation+in+Fluid+Pressure

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​ **What is Fluid Pressure? ​ ** Fluid Pressure is the pressure at some point within a fluid("Fluid Pressure").

**When and Where Fluid Pressure Occurs ** Variation in Fluid Pressure occurs in one of two situations:


 * 1) An open condition, such as the ocean, a swimming pool, or the atmosphere.
 * 2) A closed condition, such as a water line or a gas line.("Fluid Pressure")

**Pressure and Elevation** Air pressure decreases as elevation increases. When your ears pop when you are in an elevator or on an airplane, this comes into effect <span style="font-family: 'Palatino Linotype','serif'; font-size: 14pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-font-family: Arial; mso-bidi-language: AR-SA; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: EN-US;">. At higher elevations, there isn't as much air above and therefore less weight of air to support. When the air pressure outside your body changes, the air pressure inside will adjust too, but more slowly. For a moment, the air pressure behind your eardrums is greater than it is outside. Your body releases this pressure which makes the pressures once again balanced.(Kahan).
 * R**

<span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">**Pressure and Depth** <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;"><span style="font-family: 'Palatino Linotype','serif'; font-size: 11pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-font-family: Arial; mso-bidi-language: AR-SA; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: EN-US; msoansilanguage: EN-US; msobidifontfamily: Arial; msobidilanguage: AR-SA; msofareastfontfamily: 'Times New Roman'; msofareastlanguage: EN-US;">"<span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;">Fluid pressure depends on depth. The pressure at one meter below the surface of a swimming pool is the same as the pressure one meter below the surface of a lake. But if you dive deeper into the water in either case, pressure becomes greater as you descend. The deeper you swim, the greater the pressure you feel. <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;">**<span style="font-family: 'Palatino Linotype','serif'; font-size: 11pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-font-family: 'Times New Roman'; mso-bidi-language: AR-SA; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: EN-US; msoansilanguage: EN-US; msobidifontfamily: 'Times New Roman'; msobidilanguage: AR-SA; msofareastfontfamily: 'Times New Roman'; msofareastlanguage: EN-US;">Water pressure increases as depth increases." **<span style="font-family: 'Palatino Linotype','serif'; font-size: 11pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-font-family: Arial; mso-bidi-language: AR-SA; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: EN-US;">(Kahan)

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Pressure Variations Facts**

<span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">
 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">Atmospheric pressure decreases gradually as the elevation above sea level increases. Water pressure increases rapidly as the water depth increases.
 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">At sea level, standard atmospheric pressure is about 1000,000 N/m2.
 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">Just 10 m below the surface, the water pressure on a scuba diver is double the atmospheric pressure at sea level.
 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">The gulper eel can live 2,500 m below the surface. Pressure here is about 250 times greater than standard atmospheric pressure.
 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">Piloted sub mersibles can explore as deep as 6,500 m. Here, water pressure is 650 times greater than at sea level.
 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">Commercial airplanes fly at 12,000 m. Atmospheric pressure is 20% that at sea level.
 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">At 8,850 m, Mount Everest is the highest point on earth. Atmospheric pressure is 30% that at sea level.
 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">Some helicopters can reach 6,000 m. Here, atmospheric pressure is about halfthat at sea level.
 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">Sky divers jump from heights of 3,000 m. Here, the air pressure is 70% that at sea level.

media type="youtube" key="xij7dnQ5wBY" height="344" width="425" <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">In this video you notice that the water flows out of the hole in the bottle, because of the atmospheric pressure is traveling through the bottle and pushing down on the water. When the cap was put on the bottle, the water stopped, because there was no force pushing the water out. <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;">

media type="youtube" key="oUK7agBG4KA" height="344" width="425" <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 14pt;"> In this video you see how the greater the depth in the water, the greater the pressure. You can recognize how the lower holes stream out further than the higher ones.

**To find more information, go to** [|**Variation in Fluid Pressure**]**<span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 13px;">. If a login screen comes up, USERNAME: hmsstudent PASSWORD: Hackettstown **

Barometer: This device measures atmospheric pressure.



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<span style="font-family: Symbol; font-size: 10pt; mso-bidi-font-family: Symbol; mso-fareast-font-family: Symbol; msobidifontfamily: Symbol; msofareastfontfamily: Symbol; msolist: Ignore;">· ("Bernoulli's Principle")<span style="font-family: 'Arial','sans-serif'; font-size: 10pt; mso-fareast-font-family: 'Times New Roman';"> To see more cool diagrams of fluid pressure go to [|Bernoulli's Principle].