Physics - Energy and Efficiency

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  • Created by: Jenny
  • Created on: 18-05-13 17:03
what can never happen to energy?
be destroyed
1 of 6
what happens to the energy that isnt 'useful'?
it is wasted
2 of 6
what happens to the surroundings when energy is wasted?
they warm up
3 of 6
what is the equation for efficiency?
useful power out divided by total power in
4 of 6
what does payback time mean?
the amount of time it takes to get your money back
5 of 6
what is the formula for payback time?
cost of insulator divided by annual fuel saving
6 of 6

Other cards in this set

Card 2

Front

what happens to the energy that isnt 'useful'?

Back

it is wasted

Card 3

Front

what happens to the surroundings when energy is wasted?

Back

Preview of the front of card 3

Card 4

Front

what is the equation for efficiency?

Back

Preview of the front of card 4

Card 5

Front

what does payback time mean?

Back

Preview of the front of card 5
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