1
Q
What unit do we use to measure power?
A
Watts, W
2
Q
What is power?
A
the rate (how quickly) energy is transferred
3
Q
Name the five main energy stores.
A
Chemical
Thermal
Kinetic
Elastic potential
Gravitational potential
4
Q
In words, what equation links speed, distance and time?
A
Speed = distance ÷ time
5
Q
What unit do we use to measure speed?
A
Metres per second, m/s
6
Q
What is a wave?
A
An oscillation that carries energy
7
Q
What is an oscillation?
A
A repeated backwards and forwards motion (or a repeated increase and decrease)
8
Q
What is a medium?
A
The material through which a wave passes (can be a vacuum)
9
Q
Give four examples of a medium.
A
Air
Glass
Water
A vacuum
10
Q
In words, what equation links energy, time and power?
A
Energy = power × time
