What+is+Pressure?

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There is: Atmospheric Pressure - Pressure exerted on the earths atmosphere at any given point.
 * Different types of pressure can be found [|here] **

Fluid media type="custom" key="5142065"Pressure - Pressure exerted by a fluid. This is an example, it shows pressurized water tank cleaning. Explosion or [|deflagration]- Resulting pressure of ignited gases, mists, and dusts. An example of this would be a dust or particle explosion.



Stagnation - Pressure a fluid exerts when it is forced to stop moving. Examples of this would be when water is rushing down a flooding street fast and someone has built a dam that will stop the water. The water exerts a pressure once it is stopped from flowing anymore.

Surface - "Is atmospheric pressure at a point of Earth's surface, directly proportional to the mass of air over that point."



 "The word pressure is related to the word press. It refers to a force exerted over an area on the surface of an object. You mat recall that Earth's gravity pulls you downward with a force equal to your weight. Due to gravity, your feet exert a force on the surface of Earth over an area the size of your feet. In other words, your feet exert pressure on the ground. " (Jones74)

When you step outside inmto two feet of snow, you sink down until it's at your knee. You see a bird next to you just resting on top of the snow. When it flies away in only leaves marks. Why does this happen? The bird is alot smaller in size to you and has alot more mass. Therefore its pressure is lighter upon the ground.

"Force and pressure are closely related, but they are not the same thing. Pressure decreases as the area over which a force is distributed increases. The larger the area over which the force is distributed, the less pressure is exerted. In order to stand in the snow without sinking, you can't make yourself weigh the same as a bird. However, you can change the area over which you exert the force of your weight." (Jones75)

Fluid Pressure can occur in 2 diffrent situations. The firstis a open condition. An open condition is a pool or the ocean. The second id closed conditio. This is a gas line or a water line. To calculate fluid pressure you have to times weight density by the depth of the fluid.

​ P=WH ​



To calculate Pressure you can do the following equation:

P=F/A (F=Force, A= Area) When an object is sitting on a surface the force is the [|weight]of the object.

The SI unit for pressure is the pascal, which is equal to one newton per square meter. In other parts of the world it is measured in pounds per square inch (psi), and bar.

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