Bernoulli's+Principle

__Bernoulli’s Principle __

__Table of Contents__ 1. Bernoulli’s Principle Defined 2. Pressure and Moving Fluids 3. Bernoulli Effect - Science Theater 17 4. Applying Bernoulli’s Principle 5. About Bernoulli’s Principle and Fluid Pressure 6. Works Cited 7. Bernoulli's Principle in Action 8.Fluid Mechanics 9. Bernoulli's Principle Xtra Normal Video 10. Works Cited

Bernoulli's principle //states that the faster a fluid moves, the less pressure the fluid exerts.// In the 1700's, scientist Daniel Bernoulli discovered that the pressure of a moving fluid is different than the pressure of a fluid at rest (Jones 96).
 * __Bernoulli's Principle Defined__**



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 * __Pressure and Moving Fluids__**

With moving fluids and paper, you can discover Bernoulli's principle. It is discovered in the behavior of paper when you blow on the edge of the paper. The air above the paper moves, but the air below the paper does not. The moving air exerts less pressure than the still air. The greater pressure on the bottom of the paper pushes the paper up. As a result, we can find that because of Bernoulli's principle, the paper moves up (Jones 96). media type="youtube" key="olVJzVadiFs" height="320" width="412"


 * __Applying Bernoulli's Principle__**

In planes and helicopters you can see how objects in flight inlcude Bernoull'is principle when flying. An airplane wing is designed to make an upward force for a plane in flight. Air moves faster above the wing, creating an area of lower pressure. The fluid pressure pushes the plane upward. Planes and helicopters and other things are designed to create //lift//,an upward force. Blades on a helicopter are designed in a position so it helps create lift (Jones 97 and 100).

Flying disks can fly through the air from the lift that is created from the air moving across the disk. The disks shape helps the low pressure on the bottom of the disk create lift and keep it in the air. Think of a frisbee, and the way the air passing by it creates lift and keeps it in the air. The shape of a frisbee is what helps it stay afloat (Jones 99).



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With chimney's and the pressure involved with them you can discover Bernoulli's principle. The wind blowing across the top of a chimney creates an area of low pressure, and creates high pressure by the fire inside the chimney. This brings the smoke out of the chimney. If you've ever used a perfume atomizer, you have experienced Bernoulli's principle. When you squeeze the rubber bulb, air moves quickly past the top of the tube. The fast moving air creates low pressure at the top of the tube. The greater pressure in the flask pushes the liquid up into the tube. The air stream breaks up the liquid into small drops and as a result, the liquid comes out as a mist (Jones 98).

You might find that as you read about Bernoulli's principle, you will hear about pressure and fluid pressure. **Pressure** is a force exerted over an area on the surface of an object. **Fluid Pressure** is is all the forces exerted from a particle in a fluid combined to make one pressure exerted by the fluid. Areas of high pressure always move to areas of low pressure. So when things like planes fly, the high pressure on the bottom of the wing push up creating lift, to to area of low pressure on top of the wing, where the speed of the air is greater (Jones 75-76).
 * __About Bernoilli's Principle__**

__**Bernoulli's Principle in Action**__ The faster a fluid like air or water flows over a surface, the less pressure the fluid exerts on that surface. A pitcher can make a baseball curve by making it spin. On one side of the ball, air carried along by the spinning ball rushes past in the same direction the ball is moving. On the other side of the ball, air is pushed in the opposite direction. Pressure is reduced on the side of the ball with the air traveling faster. Higher air pressure on the other side of the ball pushes it out of a straight path, making the ball curve (Newton, and Nagel 42).

Fluid mechanics are divided into the behavior of liquids at rest, hydrostatistics, hyrdodynamics, the behavior of liquids in motion and aerodynamics, and the behavior of gases in motion. **Hydrodynamics** are the study of fluid flow, fluid friction and viscosity. The increase in velocity of a fluid creates a decrease in pressure, which was explained by Bernoulli. **Hydrostatistics** are forces exerted by a fluid in all directions. Fluid pressure isn't affected by the shape of the container surrounding the fluid. Water pressure between two ships that pass eachother decrease. The ships that pass eachother closely at high speeds are in danger of collision. Hydrostatics are applied to the design of the turbine, and then the momentum or pressure of a moving liquid creates a torque that makes the rotation of the turbine to transform into electrical energy (Trefil 200).
 * __Fluid Mechanics__**

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Works Cited //Bernoulli's Principle//. Web. 14 May 2010. .

"Bernoulli Effect - Science Theater 17 ." YouTube.com. Web. 23 May 2010. <[]>.

"Bernoulli's Principle." xtranormal.com. Web. 21 May 2010. <[]>.

// "Daniel Bernoulli." //Interpolating the natural factorial n! //. Web. 14 May 2010.// // .

Jones, Motin,Forces and Energy. //Motion, Forces and Energy//. Upper Saddle River, New Jersey: Pearson Education Inc., 2009. (99-101). Print.

Newton, David, and Rob Nagel. //Bernoulli's Principle//. 1:A. 1. New York: U-X-L, 1998. 42. Print.

www.ultimatehandbook.com/Webpages/Begin ner/physics1.gif&imgrefurl=http://www.ultimatehandbook.com/Webpages/Beginner/physics.ht ml&usg=__2Q7ykQNqzS4THzHUl5B6N0E01s=&h=297&w=350&sz=31&hl=en&start=1&itbs=1&t bnid=KGd1OHxvQSJhEM:&tbnh=102&tbnw=120&prev=/images%3Fq%3Dbernoulli%2Bfrisbee% 26hl%3Den%26gbv%3D2%26tbs%3Disch:1>.

// Trefil, James. //Encyclopedia of Science and Technology//. New York: Routledge, 2001. 200. Print.