Energy Transfers 1

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Energy Transfers 1

  1. 1. Energy<br />Energytransfers<br />
  2. 2. Match each of these to the type of energy that it contains<br />A mug of coffee<br />Kinetic energy<br />A piece of coal<br />Elastic energy<br />A coiled spring<br />Chemical energy<br />A moving bicycle<br />Heat energy<br />
  3. 3. Energytransfers<br /><ul><li>Energy can bechangedfromoneformtoanother
  4. 4. Example:
  5. 5. A candlecontainschemicalenergy
  6. 6. Whenthecandleburnsthechemicalenergyistransferredinto…
  7. 7. Thesechanges canberepresentedbyenergyflowdiagrams
  8. 8. Chemicalenergyheatenergy + light energy</li></li></ul><li>Energytransfers<br />What are theenergytransfersfor a TV?<br />light<br />sound<br />electrical<br />heat<br />
  9. 9. Energytransfers<br />What are the main energy transfers for a car engine? <br />kinetic<br />sound<br />chemical<br />heat<br />
  10. 10. Energytransfers<br />What are the main energy transfers for a radio? <br />sound<br />heat<br />electrical<br />
  11. 11. Energytransfers<br />
  12. 12. A hair dryer changes __________ energy to<br /> __________ energy, ________ energy and <br />______ energy<br />The Sun changes __________ energy to ________ energy and _______ energy.<br />When a catapult is released it changes ________ energy to ______________ ___________ energy and __________ energy.<br />
  13. 13. Conservation of energy<br />What happens to the total energy of a system before and after and energy transfer? <br />It remains the same but exists in different forms<br />“Energy cannot be created or destroyed. It can only be changed from one form to another.”<br />
  14. 14. The amount of electrical energy which is inputted equals the total amount of energy outputted <br />light<br />sound<br />electrical<br />heat<br />
  15. 15. The law of conservation of energy<br />Energy can be transferred in more than one form at a time.<br />The INPUT energy will always equal the total OUTPUT energy.<br />“Energy cannot be created or destroyed. It can only be changed from one form to another.”<br />
  16. 16. Kinetic energy<br />58%<br />(Useful spinning of the drill bit)<br />Energy Transfer Values<br />Electrical energy<br />100%<br />Kinetic energy<br />22%<br />(Wasted vibration of the drill)<br />Heat energy<br />20%<br />(wasted)<br />

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