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Energy

Energy. Types of Energy. Kinetic – energy of motion Potential – stored energy Thermal – form of energy associated with heat Nuclear - energy stored in the nucleus of an atom and released through fission, fusion, or radioactivity Radiant – energy associated with light.

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Energy

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  1. Energy

  2. Types of Energy • Kinetic – energy of motion • Potential – stored energy • Thermal – form of energy associated with heat • Nuclear - energy stored in the nucleus of an atom and released through fission, fusion, or radioactivity • Radiant – energy associated with light

  3. Characteristics of Energy • Energy is strictly an abstract concept, but it can be measured. • Energy may be stored or transported by material objects or by fields. • Energy may be transformed from one type to another. • Energy is conserved (First law of Thermodynamics)

  4. Thermal Energy • Not the same as heat! • Joule’s paddlewheel experiment • Work - kinetic, potential, and heat?? • A new type of energy! • Temperature • Temperature scales and absolute zero • The transfer of thermal energy – HEAT! • Conduction • Convection • Radiation

  5. Entropy • The tendency toward disorder or chaos. • The 2nd Law of Thermodynamics: Entropy always increases! (Like Humpty Dumpty) • The Heat Death of the Universe

  6. Nuclear Energy • energy stored in the nucleus of an atom and released through fission, fusion, or radioactivity • 1 gram of wood converted in 1 second would release 9 x 1013 W of power! Between 10000 and 100000 tons of TNT! A bomb! • The sun loses ~ 4 x 106 tons every second to continue “burning.”

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