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  • 1.  
  • 2.
    • To know what useful and wasted energy are.
    • To know and explain how energy can wasted.
  • 3.
    • If all energy transfers were perfect, the
    • useful energy output from an appliance
    • would be the same as the input energy .
    • In practice, however, some wasted
    • energy is nearly always produced during
    • the conversion .
  • 4.
    • The Total Energy Input = Total Energy Output
    • Energy is not created or destroyed
    • The Output Energy is always in two
    • or more forms which can be Useful
    • or Wastage Energies.
  • 5.
    • Refer to the energy animated diagram number 3
  • 6.
    • What is useful energy?
    • Is energy transferred in the form and where it is desired.
  • 7.
    • Is the energy that is not usefully transferred or
    • transformed.
    • Refer to example of energy wasting in no. 6
  • 8.
    • What is useful energy?
    • http://www.youtube.com/watch?v=ywJ3WGpf0hw&NR=1&feature=fvwp
  • 9.
    • Refer to Energy animated diagrams on page 4, 5 and 6.
  • 10.
    • http://www.yteach.co.uk/page.php/resources/view_all?id=Domestic_Tungsten_electrical_energy_trees_candle_thermal_energy_chemical_energy_light_energy_conservation_kinetic_energy_electrical_energy_Converting_energy_t_page_7&from=search
  • 11.
    • Give answers to questions a and b on page 246 and question c on page 247.
    • Do the summary questions 1, 2 and 3 on page 247.