Energy

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1. Conservation of energy

  • Energy can be wasted, transferred usefully or dissipated
  • It can be transferred usefully, stored or dissipated, but can't be destroyed
  • Energy can be wasted, changed or transferred
  • Energy can be changed, dissipated or destroyed
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2. In all system changes...

  • energy is dissipated/wasted
  • energy is usefully transferred/stored
  • energy is dissipated/stored
  • energy is dissipated/transferred

3. What is a system?

  • A group of objects
  • An object and group of objects
  • An object or group of objects
  • An object

4. Power formulas

  • energy transferred/temperature
  • energy speed/time
  • energy transferred/time or work done/time
  • energy temperature/time or power/energy

5. Name and describe the four energy pathways/carriers

  • Mechanical-force Electrical-light Heat-current Radiation-current
  • Mechanical-work done by a force, Electrical-work done by a current, Heat-temperature change, Radiation-light eg infrared
  • Mechanical-light Electrical-force Heat-current Radiation-force
  • Mechanical-current Electrical-force Heat-light Radiation-Temperature change
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