Using Energy

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  • Created by: Maddi
  • Created on: 10-04-14 15:27
What forms of energy are there?
Magnetic, Kinetic, Heat, Light, Gravitational potential, Chemical, Sound, Eletrical, Elastic potential and Nuclear.
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What do we mean by 'conservation of energy'?
Energy cannot be created or destroyed.
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Why is the conservation of energy such an important idea?
Conservation of energy applies to all energy changes.
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What is 'useful' energy?
Useful energy is energy transferred in the place we want it and in the form we need it.
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What do we mean by 'wasted' energy?
Wasted energy is energy that is not usefully transferred.
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What eventually happens to wasted energy?
Useful and wasted energy both end up being transferred to the surroundings, which become warmer.
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Does energy become less useful after we use it?
As energy spreads out it gets more and more difficult to use for further energy transfers.
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How efficient can a machine be?
A machine cannot be more than 100% efficient.
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How can we make machines more efficient?
Measures to make machines more efficient iclude reducing friction, air resistance, electrical resistance and noise due to vibrations.
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Other cards in this set

Card 2

Front

What do we mean by 'conservation of energy'?

Back

Energy cannot be created or destroyed.

Card 3

Front

Why is the conservation of energy such an important idea?

Back

Preview of the front of card 3

Card 4

Front

What is 'useful' energy?

Back

Preview of the front of card 4

Card 5

Front

What do we mean by 'wasted' energy?

Back

Preview of the front of card 5
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