Energy
- Created by: Ellie
- Created on: 02-06-13 15:05
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- Energy resources and transfer
- types of energy
- Electrical
- Gravitational
- Chemical
- Sound
- Kinetic
- Thermal
- Elastic
- Nuclear
- Light
- Electrical
- 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
- Heat is transferred by
- 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
- Work done = force x distance
- 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
- Turbines are placed in exposed places
- 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
- nuclear reactors
- types of energy
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