Using energy

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  • Created by: Sam Evans
  • Created on: 23-05-14 19:49
What form of energy does a moving car have?
Kinetic energy
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What form of energy does a stretched spring have?
Elastic potential energy
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When is electrical energy transferred?
When an electric current flows
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What are the useful energy transfers that take place in a hairdryer?
Electrical energy to kinetic energy and energy transferred by heating
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What are the useful energy transfers that take place in a television?
Electrical energy to light and sound
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What energy transfers take place when you lift a ball into the air and then drop it so it falls to the ground?
Kinetic energy to gravitational potential energy to kinetic energy
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Wear and tear causes a particular machine to waste more energy. What happens to the efficiency of this machine?
Its efficiency decreases
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Why is an electric heater the only appliance that may have an efficiency of 1, or 100%?
Because it it designed to transfer energy by heating, which is normally how appliances waste energy
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Why do electrical appliances such as televisions and computers have vents?
So wasted energy can be transferred easily to the surroundings making them warmer
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Other cards in this set

Card 2

Front

What form of energy does a stretched spring have?

Back

Elastic potential energy

Card 3

Front

When is electrical energy transferred?

Back

Preview of the front of card 3

Card 4

Front

What are the useful energy transfers that take place in a hairdryer?

Back

Preview of the front of card 4

Card 5

Front

What are the useful energy transfers that take place in a television?

Back

Preview of the front of card 5
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