Energy

HideShow resource information
  • Created by: Ellie
  • Created on: 02-06-13 15:05
View mindmap
  • Energy resources and transfer
    • types of energy
      • Electrical
        • Gravitational
      • Chemical
      • Sound
      • Kinetic
      • Thermal
      • Elastic
      • Nuclear
      • Light
    • Efficiency
      • = useful energy output/ total energy input
      • Sankey diagrams
        • The thickness= the amount of energy
      • Wasted energy is dissipated as heat
      • All energy is transferred
        • Heat is transferred by
          • Radiation
          • convection
          • Conduction
    • Reducing energy transfers
      • Loft insulation
      • Hot water tank jacket
      • Draught proofing
      • Cavity wall insulation
      • double glazing
      • Curtains and carpets
    • Equations
      • Work done = force x distance
        • joules
      • Power = work done/ time taken
        • Watts
      • Kinetic energy = 0.5mass x speed ^2
        • joules
      • Gravitational potential energy = mass x gravity x height
    • Generating energy
      • nuclear reactors
        • fission of uranium makes steam to turn a turbine
        • expensive
        • Radioactive waste
      • Wind farms
        • Turbines are placed in exposed places
          • Kinetic energy>electrical energy
        • Renewable
        • noisy
      • Geothermal energy
        • heat from under ground heats water to drive turbine
        • renewable
        • exppensive
      • solar cells
        • light energy>electrical energy
        • renewable
        • can only be done on a small scale
      • Wave power
        • kinetic energy . electrical energy
        • renewable
        • boat hazard
      • Tidal
        • Water drives turbaines
        • alters habitat
        • renewable
      • Hydroelectric
        • catches rain and moves to power turbine
        • loss of habitat
        • renewable

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Energy resources »