P1

• What are the 4 energy pathways?

  • H Heating
  • E Electrical
  • R Radiation(waves)
  • M Mechanical
• What are the 8 energy stores?

  • C Chemical
  • T thermal
  • K kinetic
  • G gravitational potential
  • E elastic potential
  • N nuclear
  • E electrostatic
  • M magnetic.
• Why is energy dissipated during a bungee jump?

  • Friction with air particles
  • Stretching effects in the bungee rope which is not fully elastic
• How do we reduce unwanted energy transfers in a pendulum?

  • Use a lubricant
  • Remove air particles
  • Reducing friction
• Disadvantages of wind and solar energy?

  Not reliable
• Disadvantages of hydro-electric power?

  Destroys habitats
• Disadvantages of tidal power?

  Harmful to wildlife
• Disadvantages of wave power?

  • Small scale
  • Experimental
• Disadvantages of geothermal energy?

  Do not have the resources in the Uk
• Disadvantages of biofuel?

  • Produces CO2 (carbon neutral)
  • increase demand for food and price
• What are the advantages of renewable energy?

  • Never run out (sustainable)
  • Does not contribute CO2 to atmosphere
• What are the disadvantages of nuclear power?

  • Non renewable (finite resource e.g. U uranium and P plutonium)
  • Highly dangerous radioactive materials
  • Decommissioning takes many years and is very expensive
  • Radioactive waste has to be stored
• What are the advantages of nuclear power?

  • Releases no CO2
  • Extremely reliable
• What are the disadvantages of fossil fuels?

  • Produces a huge amount of CO2
  • Non renewable
  • Produces other pollutants
• What are the advantages of fossil fuels?

  • Reliable
  • Releases a great deal of energy
  • Abundant and relatively cheap
  • Versatile (used for transport, generating electricity and heating)
• What factors affect the cooling of a building?

  • Pack cavity with insulating material
  • Double glazed windows
  • Loft insulation
  • Thick walls - reduce rate of energy transfer
• How do we decrease energy transfer?

  Decreasing thermal conductivity
• How do you increase efficiency of an energy transfer?


  • Reducing the wasteful dissipation of thermal energy to the surrounding (insulation)
  • Lubrication
• Which way does current flow?

  From positive to negative