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   <title>About.com Physics: What's Hot Now</title>
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   <description>These articles that had the largest increase in popularity over the last week</description>
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   <dc:date>2009-11-25T10:07:09Z</dc:date>

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         <title><![CDATA[Turkey Physics]]></title>
         <link>http://physics.about.com/od/physicsintherealworld/p/TurkeyPhysics.htm</link>
         <description><![CDATA[Learn about how physics relates to the cooking of a turkey.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Physics Movie List]]></title>
         <link>http://physics.about.com/od/physicsfilmsmovies/tp/physicsmovies.htm</link>
         <description><![CDATA[A list of films which prominently feature physics or physicists, generally in an inspiring (and entertaining) way.]]></description>
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         <title><![CDATA[Physics of a Car Collision]]></title>
         <link>http://physics.about.com/od/energyworkpower/f/energyforcediff.htm</link>
         <description><![CDATA[In physics, the distinction between the concepts of energy and force can be very subtle, but important.  Energy is an absolute measure of the system, whereas the force is specifically related to the set-up of the situation.]]></description>
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         <title><![CDATA[Physics of the Greeks]]></title>
         <link>http://physics.about.com/od/physicshistory/a/GreekPhysics.htm</link>
         <description><![CDATA[A brief overview of the physical sciences as discovered and practiced by the ancient Greeks.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Surface Tension]]></title>
         <link>http://physics.about.com/od/physicsexperiments/a/surfacetension_5.htm</link>
         <description><![CDATA[The values of surface tension for various liquids, as determined by experimental research in the laboratory.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Isochoric Process]]></title>
         <link>http://physics.about.com/od/glossary/g/isochoric.htm</link>
         <description><![CDATA[definition of an isochoric process]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Transistor]]></title>
         <link>http://physics.about.com/od/electroniccomponents/f/transistor.htm</link>
         <description><![CDATA[Understand how a transistor functions, and how its design incorporates into an overall electronic circuit.]]></description>
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         <dc:subject>education</dc:subject>
         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Density]]></title>
         <link>http://physics.about.com/od/glossary/g/density.htm</link>
         <description><![CDATA[Definition of density]]></description>
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         <dc:subject>education</dc:subject>
         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <item>
         <title><![CDATA[Newton&#039;s Law of Gravity]]></title>
         <link>http://physics.about.com/od/classicalmechanics/a/gravity_2.htm</link>
         <description><![CDATA[Gravitational fields are a method of expressing gravity in terms that make it easy to apply in specific cases.  Learn about how gravitational fields, and the equations related to them, are used to solve problems.]]></description>
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         <dc:subject>education</dc:subject>
         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Doppler Effect in Light]]></title>
         <link>http://physics.about.com/od/lightoptics/a/doplight.htm</link>
         <description><![CDATA[Learn about the manifestation of the Doppler effect from a moving light source and how the observed light exhibits either a red shift or blue shift to the wavelength and frequency.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Stephen Hawking]]></title>
         <link>http://physics.about.com/od/stephenhawking/p/hawking.htm</link>
         <description><![CDATA[Physicist and cosmologist Stephen Hawking is probably one of the most popular modern physicists, mostly because of his popular bestselling book describing the state of cosmology and astrophysics and appearances on popular entertainment shows ... oh, and Hawking's quite a bright physicist who has revolutionized our understanding of black holes.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Double Slit Experiment]]></title>
         <link>http://physics.about.com/od/lightoptics/a/doubleslit_2.htm</link>
         <description><![CDATA[Learn about Young's Double Slit experiment, where interference patterns seem to prove the wave theory of light.  But there's way more to this simple experiment than meets the eye.  We'll explain the original experiment and its quantum mechanical permutations.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Schroedinger&#039;s Cat]]></title>
         <link>http://physics.about.com/od/quantumphysics/f/schroedcat.htm</link>
         <description><![CDATA[In 1935, Erwin Schroedinger developed a thought experiment which illuminated some of the problems with extending the microscopic concepts of quantum physics into the macroscopic realm.  The thought experiment has been used in the years since to highlight the key concepts of quantum physics, ranging from the role of the observer to the meaning of the wave function.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Neutron]]></title>
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         <description><![CDATA[definition of a neutron]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Vector]]></title>
         <link>http://physics.about.com/od/glossary/g/vector.htm</link>
         <description><![CDATA[Definition of a vector]]></description>
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         <dc:subject>education</dc:subject>
         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <item>
         <title><![CDATA[Physics Myths]]></title>
         <link>http://physics.about.com/od/physicsmyths/tp/physicsmyths.htm</link>
         <description><![CDATA[A list of popular physics myths.]]></description>
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         <dc:subject>education</dc:subject>
         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Doppler Effect]]></title>
         <link>http://physics.about.com/od/wavessound/a/dopplereffect.htm</link>
         <description><![CDATA[The Doppler effect takes place when source or observer of waves (generally sound) are moving, creating an alteration in the perceived frequency.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Loop Quantum Gravity]]></title>
         <link>http://physics.about.com/od/unifiedfieldtheories/f/loopquantgrav.htm</link>
         <description><![CDATA[Loop quantum gravity explains the universe in terms of tangles in spacetime.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <item>
         <title><![CDATA[Impulse]]></title>
         <link>http://physics.about.com/od/glossary/g/Impulse.htm</link>
         <description><![CDATA[Definition of impulse]]></description>
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         <dc:subject>education</dc:subject>
         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[ Albert Einstein Memorial]]></title>
         <link>http://physics.about.com/od/alberteinstein/ig/Albert-Einstein-photos/Albert-Einstein-Memorial.--lb.htm</link>
         <description><![CDATA[]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Torque]]></title>
         <link>http://physics.about.com/od/glossary/g/torque.htm</link>
         <description><![CDATA[Definition of torque]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Newton&#039;s Laws of Motion]]></title>
         <link>http://physics.about.com/od/classicalmechanics/a/lawsofmotion_3.htm</link>
         <description><![CDATA[Newton's second law of motion defines one of the most important equations in physics - the relationship between force, mass, and acceleration.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Quantum Physics Books]]></title>
         <link>http://physics.about.com/od/quantumphysicsbooks/tp/quantumbooks.htm</link>
         <description><![CDATA[A list of books about quantum physics.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Fundamental Forces of Physics]]></title>
         <link>http://physics.about.com/od/physics101thebasics/f/fund_forces.htm</link>
         <description><![CDATA[An overview of the four fundamental forces of physics and why they are so fundamental.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Free Falling Body]]></title>
         <link>http://physics.about.com/od/homeworkhelp/qt/hwh_freefall.htm</link>
         <description><![CDATA[How to calculate the initial height of a dropped object, given its velocity at a point during the fall.]]></description>
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         <title><![CDATA[Vector Mathematics]]></title>
         <link>http://physics.about.com/od/mathematics/a/VectorMath_4.htm</link>
         <description><![CDATA[Here you will be introduced to the mathematics necessary for the manipulation of vector quantities, which have both a magnitude and direction.  Vectors are used throughout physics, so an understanding of these concepts is important to solve many physics problems.]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Nuclear Fusion]]></title>
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         <description><![CDATA[Definition of nuclear fusion]]></description>
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         <dc:date>2009-11-25T10:07:09Z</dc:date>
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         <title><![CDATA[Kinetic Energy]]></title>
         <link>http://physics.about.com/od/energyworkpower/f/KineticEnergy.htm</link>
         <description><![CDATA[Kinetic energy is the energy of motion, a concept which is used widely in physics to solve problems involving changes in motion.]]></description>
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