generating electricity

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1. solar power is...

  • light/thermal energy from the sun- electrical energy
  • light/thermal energy from the sun- thermal energy of the water/ electrical energy for electricity
  • heat energy of the sun- thermal energy of the water/ electrical energy for electricity
  • kinetic energy of the sun- thermal energy
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2. energy can be created and destroyed

  • false
  • true

3. wave power is...

  • chemical energy of the water- thermal energy
  • chemical energy of the water- kinetic potential energy
  • kinetic energy of the water- electrical energy
  • kinetic energy of the water- gravitational potential energy

4. energy efficiency=

  • useful output energy/ total input energy
  • calories eaten for dinner/ price of fish and chips
  • total input energy/ useful output energy
  • total input energy x useful output energy

5. what causes energy losses

  • friction, noise, vibrations
  • air resistance, friction, sound, current
  • flying, speed, drinking
  • pull, drag, chemical
  • current, drag, potential

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