Floating+and+Sinking

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media type="custom" key="6206525" //**Density** The density of an object can be measured by its mass per unit of volume. You can find the density of an object by dividing is mass by its volume. "By comparing The densities of two objects, you can predict whether an object will sink or float in a fluid" (Jones 85). Density is a materials mass per unit of volume, but the term volume means the amount of a material contained in a volumetric unit. An example would be liter or milliliter. Density allows the comparison between the heaviness of two materials. A measurement that is related to density is specific gravity. The specific gravity of a material is the density of the object compared to the density of some standards (Newton 679). The density of the Earth is 5515.3 Kg/M3 (Wikipedia). Do you ever wonder why a helium balloon floats? It's because helium is less dense than air so it floats. An example would be a submarine. A submarine goes underwater by sinking. It sinks by taking water into its tanks, which causes an increase in density (Jones 87). A submarine floats by making its density equal to buoyant force of water (Jones 87). And then a submarine floats to the surface by releasing compressed air forcing the water out which makes the submarine less dense, and the submarine floats again (Jones 87). Buoyancy** __If you ever picked up something under water ,you notice that it feels lighter than when it is out in the air. "A buoyant force acts in the direction opposite of gravity so it makes the object feel lighter. One day in ,Syracuse the young mathematician Archimedes stepped into his bath and saw that the water was overflowing. He then found out that the volume that had flowed out of the bath had to be equal to the volume of his body. In his excitement he ran in the streets of Syracuse screaming Eureka (Newton 379)!!!!! Buoyancy = The weight of the displaced fluid. In the example of the Stadium's, the buoyant force makes the stadium's float. Also it makes the rubber duck float. media type="custom" key="6129191"__
 * || Table of contents ||
 * 1 || **__Density__** ||
 * 2 || **__Buoyant Forces__** ||
 * 3 || **__Archimedes Principle__** ||
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 * Archimedes Principle** Do you ever wonder why a ship floats in water? It floats because it displaces the same amount of water as its mass. That is because Archimedes discovered this principle. His principle states that "The buoyant force acting on a submerged object is equal to the weight of the fluid displaced by the object" (Jones 83). In the tale of Archimedes, Archimedes was given the task of determining whether King Hiero's goldsmith was embezzling gold during the manufacture of a wreath dedicated to the gods and replacing it with another, cheaper alloy. Archimedes knew that the irregularly shaped wreath could be crushed into a cube whose volume could be calculated, easily and compared with the mass, but the king did not approve of this(Newton 378). In the picture of the rubber duck, the duck displaces the amoun of fluid equal to its weight. I thos example, Archimedes principle is applied.

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Jones, T.Giffith.// Motion, Forces, and Energy Prentice Hall Science Explorer//. Upper Saddle River, N.J: Pearson Education, Inc., 2009. 82-7. Print. Newton, David E., Rob Nagel, and Bridget Travers. "Buoyancy."// U·X·L Encyclopedia of Science. //Vol. 1. Detroit: U·X·L, 1998. Print. Newton, David E., Rob Nagel, and Bridget Travers. "Density."// U·X·L Encyclopedia of Science. //Vol. 3. Detroit: U·X·L, 1998. Print. "Buoyancy."// Wikipedia, the Free Encyclopedia//. Wikipedia, 19 May 2010. Web. 20 May 2010. [].// ToonDoo - The Cartoon Strip Creator - Create, Publish, Share, Discuss! //ZOHO, 2007. Web. 20 May 2010. [|http://www.toondoo.com].// Xtranormal | Text-to-Movie//. Xtranormal Technology, 2006. Web. 21 May 2010. [|http://www.xtranormal.com].// CommentHaven.com - Free Hot Comments, Graphics and Layouts//. 2007. Web. 21 May 2010. [|http://ww.commenthaven.com].
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http://www.rubaduck.com/graphx/rubber_duck_buoyancy_force_diagram.gif []
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