Yr8-Energy And Power Flashcards
1
Q
What does power tell you?
A
How much energy is transferred per second
2
Q
How can you calculate power with an equation?
A
Power(w)=energy(J)
_______
Time(s)
3
Q
How many watts are there in a kw?
A
1000 watts
4
Q
If you were going to keep the temperature the same, how would you do that?
A
You need to transfer the energy at the same rate as energy is being transferred from it.
5
Q
Where does your energy come from?
A
Power stations which they measure in kwh(Kilowatt hours) which determine how much you pay.
6
Q
What could you do to reduce your energy bill?
A
Use fewer appliances.
7
Q
How do you calculate a kwh?
A
If you use 1kwh for 1 hour, this would be…
1kwh x 1 hour
=12kwh
In joules,
1000j/s x 3600s
=3,600,000
