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The Fluid States Bernoulli’s Principle Kristen Reiter water droplets. 28 Sept. 2010. Flickr. N.p., n.d. Web. 10 Jan. 2011..
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-Fluids in Motion- o Bernoulli’s Principle explains the effect motion has on a fluid’s pressure and velocity. -Forces Within Liquids- o Electromagnetic forces in liquids affect the way fluids act. Diaz, Ryan. Tubular. 2 Feb. 2008. Flickr. N.p., n.d. Web. 10 Jan. 2011..
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Fluids in Motion Seashore. 28 Oct. 2010. Flickr. N.p., n.d. Web. 11 Jan. 2011.<http://www.flickr.com/photos/52445777@N06/ 5134797287/>.
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Bernoulli’s Principle as the velocity of a fluid increases, the pressure decreases (or vice versa) higher velocity → lower pressure narrower space → higher velocity lower velocity, higher pressure higher velocity, lower pressure
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Net Work Net work is the overall work being done. (In this case, to move a fluid.) Tapp, Philip. Nets. 30 Jan. 2010. Flickr. N.p., n.d. Web. 11 Jan. 2011. <http: //www.flickr.com/ photos/philtapp/ 4315913808/>.
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Streamlines narrow flow → closer streamlines → greater velocity → lower pressure Jumbled or unsmooth streamlines mean the fluid is turbulent and Bernoulli’s Principle does not apply. o Represent the flow of fluid around objects. Streamline. 3 July 2009. Flickr. N.p., n.d. Web. 11 Jan. 2011..
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Forces Within Liquids Rav Productions. Ocean Curl. 27 Jan. 2007. Flickr. N.p., n.d. Web. 11 Jan. 2011..
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Cohesive Forces Particles that affect the behavior of liquids Attract each other with electromagnetic force
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Surface Tension Surface of a liquid to contracts to the smallest possible area On the surface particles are not attracted upwards This creates a net downwards pressure Also causes spherical droplets
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Adhesion Attractive force between different substances Electromagnetic force
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Capillary Action Rise of liquid in a narrow glass tube Because adhesive forces are stronger than the cohesive forces
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Evaporation When fast moving particles break through the surface layers of a liquid Only most energetic particles escape Has a cooling effect
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Volatile Liquids Volatile liquids evaporate quickly Have weak cohesive forces More noticeable cooling effect
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Condensation Evaporated particles returning to liquid state Cause by decrease in temperature or kinetic energy Makes the air humid
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Quick Review! Bernoulli’s Principle means higher velocity = lower pressure Cohesive forces are forces that attract particles in a liquid to each other, and cause surface tension Capillary action is when a liquid “climbs” a glass tube, a result of adhesion.
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Quick Review! Evaporation is when fast moving particles escape the surface of a liquid. Volatile liquids evaporate quickly! Condensation is when evaporated liquids cool down or lose energy and become liquid again.
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Works Cited Zitzewitz, Paul W. Physics Principles and Problems. 2002 ed. New York: Glencoe, 2002. Print.
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