Physics 1b

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  • Created by: kelz0209
  • Created on: 08-04-14 11:46
What are the two formulas for calculating the cost of electricity?
1. No. of units(kWh) used=power(kW) x time(hours) 2. Cost=no. of units x price per unit
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Name 4 non-renewable energy sources.
1.Coal 2.Oil 3.Natural gas 4.Nuclear fuels (uranium and plutonium)
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Name 8 renewable energy sources.
1.Wind 2.Waves 3.Tides 4.Hydroelectric 5.Solar 6.Geothermal 7.Food 8.Biofuels
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What are the differences between renewable and non-renewable energy?
1.Non-renewable energy will run out one day, renewable will never run out. 2.Non-renewable damage environment, renewable less damaging. 3.Non-renewable provides most energy, renewable not much-unreliable-depends on weather.
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How is energy generated from non-renewable sources?
1.Fossil fuel burned-convert stored chemical to heat energy.2.Heated energy used to heat water(or air) to produce steam.3.Steam turns turbine-heat to kinetic energy.4.Turbine connected to a generator-transfers kinetic to electrical energy.
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Where are wind turbines usually placed?
In exposed areas such as, on moors or coasts-there is more wind.
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How do wind turbines work?
Wind turns the blades, this turns the generator, which creates electricity.
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Give disadvantages of wind turbines.
1.Spoils the view-need 1500 wind turbines to replace one coal fired power station. 2.Noisy. 3.Dependent on wind-when wind stops so does power-impossible to increase supply, when high demand. 3.Inital costs quite high.
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Give advantages of wind turbines.
1.No pollution. 2.No fuel costs and minimal running costs. 3.No permenant damage to landscape-remove turbines, remove noise and view returns to normal.
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Other cards in this set

Card 2

Front

Name 4 non-renewable energy sources.

Back

1.Coal 2.Oil 3.Natural gas 4.Nuclear fuels (uranium and plutonium)

Card 3

Front

Name 8 renewable energy sources.

Back

Preview of the front of card 3

Card 4

Front

What are the differences between renewable and non-renewable energy?

Back

Preview of the front of card 4

Card 5

Front

How is energy generated from non-renewable sources?

Back

Preview of the front of card 5
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