Energy And Efficiency Flashcards
1
Q
What’s Efficiency
A
The greater the proportion of energy that is usually transferred the more efficient the device is
2
Q
Where does the wasted energy go
A
Into the atmosphere
3
Q
What’s payback time?
A
Replacing an appliance with a more efficient one depending how much it costs or save
4
Q
How do you work out the efficiency?
A
Useful energy transferred by device
_______________________x100
Total energy supplied to device
5
Q
Equation for power
A
Energy // time
6
Q
Benefits of switching lights off
A
Easy to reduce energy
7
Q
Problems of switching lights off
A
Forget to switch lights
8
Q
Benefits of light bulbs
A
Use less power
9
Q
Problem with light bulbs
A
More expensive
10
Q
Washing machine benefits
A
Cheaper
11
Q
Washing machine problems
A
Noisy
12
Q
What’s payback time?
A
Replacing an appliance with a more efficient one
