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Internal pressure information


Internal pressure is a measure of how the internal energy of a system changes when it expands or contracts at constant temperature. It has the same dimensions as pressure, the SI unit of which is the pascal.

Internal pressure is usually given the symbol . It is defined as a partial derivative of internal energy with respect to volume at constant temperature:

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Internal pressure

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Internal pressure is a measure of how the internal energy of a system changes when it expands or contracts at constant temperature. It has the same dimensions...

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Pressure

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: 445  Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure. Various units are used to express pressure. Some of these...

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Pressure cooking

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steam produced from the boiling liquid. This is used to raise the internal pressure up to one atmosphere above ambient and gives higher cooking temperatures...

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Pressure vessel

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A pressure vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure. Construction methods...

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Atmospheric pressure

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Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard...

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Cylinder stress

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equation for estimating the hoop stress created by an internal pressure on a thin-walled cylindrical pressure vessel: σ θ = P r t   {\displaystyle \sigma _{\theta...

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Soda siphon

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maintaining the internal pressure, thereby preventing it from going flat. The carbonated beverage is dispensed using the internal pressure of the bottle...

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Internal energy

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(3) in (1) gives the above expression. The internal pressure is defined as a partial derivative of the internal energy with respect to the volume at constant...

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Blood pressure

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Blood pressure (BP) is the pressure of circulating blood against the walls of blood vessels. Most of this pressure results from the heart pumping blood...

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Aft pressure bulkhead

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helps maintain pressure when stratocruising and protects the aircraft from bursting due to the higher internal pressure. Aft pressure bulkheads can either...

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Diving bell

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open-bottomed wet bell and the closed bell, which can maintain an internal pressure greater than the external ambient. Diving bells are usually suspended...

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Internal bleeding

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a result, a person who is bleeding internally may initially have a normal blood pressure. When the blood pressure falls below the normal range, this is...

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Diving chamber

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sealed to hold an internal pressure significantly higher than ambient pressure, a pressurised gas system to control the internal pressure, and a supply of...

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Overpressure ammunition

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a higher internal pressure when fired than is standard for ammunition of its caliber (see internal ballistics), but less than the pressures generated...

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Airship

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"blimps", rely on internal pressure to maintain their shape. Semi-rigid airships maintain the envelope shape by internal pressure, but have some form...

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Boiler stay

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A boiler stay is an internal structural element of a boiler. Where the shell of a boiler or other pressure vessel is made of cylindrical or (part) spherical...

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Autofrettage

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pressure vessel (thick walled) is subjected to enormous pressure, causing internal portions of the part to yield plastically, resulting in internal compressive...

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Apollo 1

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high-pressure pure oxygen cabin atmosphere. Rescue was prevented by the plug door hatch, which could not be opened against the internal pressure of the...

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Space Shuttle Challenger disaster

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simulated internal pressure of a launch. Joint rotation, which occurred when the tang and clevis bent away from each other, reduced the pressure on the O-rings...

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Atmospheric diving suit

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resembles a suit of armour, with elaborate pressure joints to allow articulation while maintaining an internal pressure of one atmosphere. An ADS can enable...

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Hypertension

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high blood pressure, is a long-term medical condition in which the blood pressure in the arteries is persistently elevated. High blood pressure usually does...

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Hydraulic accumulator

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A hydraulic accumulator is a pressure storage reservoir in which an incompressible hydraulic fluid is held under pressure that is applied by an external...

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No Pressure

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Look up no pressure in Wiktionary, the free dictionary. No Pressure may refer to: No Pressure (film), a 2010 British short film "No Pressure" (How I Met...

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Oil pressure

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Oil pressure is an important factor in the longevity of most internal combustion engines. With a forced lubrication system (invented by Frederick Lanchester)...

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Pressure drop

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energy (i.e., internal energy). Since the thermal energy cannot be converted back to hydraulic energy, the fluid experiences a drop in pressure, as is required...

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