P1: Power Flashcards
1
Q
Power
A
The rate at which energy is transferred
2
Q
Unit of energy
A
Joules
3
Q
Formula for Power
A
P = E/T
4
Q
What are the values for each unit in P = E/T
A
P = Power in watts (W)
E = Energy in joules (J)
t = Times in seconds (s)
5
Q
What’s the other formula for power
A
P = W/t
W = work done in joules (J)
6
Q
What is the alternative unit for energy
A
kilowatt hour (kWh) (1,000 watts). This means that the power of 1000 watts has been used for one hour
7
Q
Formula for kilowatt hour
A
E = P x t
P = power in kilowatts (kW)
E = energy in kilowatt hours (kWh)
t = time in hours (h)
8
Q
How do you convert W into kW
A
Divide by 1000
9
Q
How do you convert kW into W
A
x 1000
