Applying+Bernoulli's+Principle

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=By: Ana & Kaela =

Table of Contents
 * * Objects in Flight ||
 * * Atomizers ||
 * * Chimneys ||
 * * Flying Discs ||

**//__ Objects in Flight __//** Have you ever wondered how an object stays in flight? Bernoulli’s Principle states that a stream of fast-moving fluid exerts less pressure than the fluids around it. Depending on how fast the air is going above and below the object depends if the object is going up or down. If the air moves faster above the object, the fluid pressure makes the object go up. When the air moves faster below the object, the fluid pressure makes the object go up or down. That’s how planes and other objects stay in flight. The shape of an object can make the air move faster either above or below the object (Jones 97). A lift is an upward force, which is exactly why airplanes’ wings are designed to create lift. Because of the way the wing is slanted, the air hits it so that the air above the wing is moving faster, pushing it downward. The same amount of force is being pushed upward which is the same force that helps a plane take off. Lift is also produced by the curved shape of the wing. The top of the wing is curved so the air above the wing is faster than the air below it. Therefore, there is less pressure being exerted on the top than bottom. Because of the different pressures, the different pressures produce lift (Jones 97). 

**//__ Atomizers __//** Have you ever wondered how some perfume comes out when you just squeeze some air over the top of the bottle? Bernoulli’s Principle helps explain why this happens. As you squeeze the bulb, air rapidly flies across the top of the bottle. Because of the air flying across the top, it lowers the air pressure at the top. So now there’s higher pressure on the bottom than the top. Next, because of the greater pressure, it pushes the liquid up into the tube. While the liquid is going up, the air stream breaks the perfume into small drops. Therefore, the liquid comes out in a mist. This process is similar to the way the pressure differs in carburetors of older gasoline combines and how it pushes the gasoline up the tube. When the gas is up there, it combines with the air to run the engine (Jones 98).

**//__ Chimneys __//** Without Bernoulli’s Principle, we wouldn’t be able to have fires. The smoke rises up the chimney. Part of it is that heat rises. The other part is that it is pushed. When wind blows across the chimney top, it lowers the pressure. Because the higher pressure is at the bottom of the chimney, it pushes the air and smoke up to the top of the chimney, similar to perfume bottles (Jones 98).

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**//__ Flying Disks __//** Flying disks are similar to airplane wings. The top part of the disk is curved like the airplane wing. Therefore, when you throw the disk the faster moving air is above the disk exerting less pressure than the air moving slower under it. All the while a net force pushes up on the flying disk, creating lift. Also, if you tilt the disk forward just a little bit, it helps keep it in the air. Because it is tilted like that, the disk pushes the air down then the air pushes back pushing the disk up. Lastly, when the disk spins, it helps keep it stable (Jones 99).

 Jones, T. Griffith.   Motion, Forces, and Energy. Upper Saddle River, New Jersey: Pearson Education, 2009. 97-99. Print. "Living Fireplace." //software-dungeon.co.uk //. Web. 11 Jan 2011. < http://www.software-dungeon.co.uk/images/115136_LivingFireplace.jpg >. "New fireplace and masonry chimney construction."   Home Care Chimney Inc.. Web. 11 Jan 2011.   Prezi - The Zooming Presentation Editor. Web. 11 Jan. 2011. http://prezi.com/           ToonDoo - World's Fastest Way to Create Cartoons! Web. 11 Jan. 2011. < http://www.toondoo.com/ >. http://www.homecarechimney.com/images/newFireplaceChimney.jpg "Wood Stove- Fireplace Contacts."   Air Quality. Web. 11 Jan 2011. <     http://www.ecy.wa.gov/programs/air/images/chimney.jpg      >.