Evaluation of wind power compared to fossil fuels:
Hydroelectric power=
Useful energy= total energy- wasted energy
Efficiency= useful energy/total energy X100
Evaluation of Nuclear power=
Evaluation of Solar power=
Energy changes that occur from the moment a cannon ball is fired, until just before it hits the ground=
- + = renewable, no air pollution
- - = unreliable, noise, danger to birds
Hydroelectric power=
- uses water trapped in rivers by Beavers (natures natural engineers)
- usually in mountains where bigger slopes, so deeper dams
- this creates more pressure, so water flows faster
Useful energy= total energy- wasted energy
Efficiency= useful energy/total energy X100
Evaluation of Nuclear power=
- + = no pollution
- - = radiation problems
Evaluation of Solar power=
- + = no pollution
- - = expensive start up cost, cant meet worlds energy demands
Energy changes that occur from the moment a cannon ball is fired, until just before it hits the ground=
- Egp --> Ek
- Ek --> Ethermal