1. Baseline (Aiming for 4): Identify ‘wasted’
and ‘useful’ energy transfers in electrical devices.
Further (Aiming for 6): Calculate the
efficiency and the wasted power of a device.
Challenge (Aiming for 8): Combine the electrical power equation with other equations to solve more complex problems.

2. Sort these units in to the correct order of size, from big to small
Joule
Nanojoule
Kilojoule
Millijoule
Megajoule
Gigajoule
Microjoule

3. Energy = 1200J
Time = 1s
Energy = 22,000J
Time = 10s
Energy = 30J
Time = 0.5s
Energy = 153,000J
Time = 180s
Energy = 50,000J
Time = 50s
Energy = 7,000J
Time = 2s
Energy = 270kJ
Time = 300s
Energy = 105,000J
Time = 300s
Energy = 1,600J
Time = 1s
Energy = 600,000J
Time = 3000s
Energy = 300,000J
Time = 25 minutes
Energy = 540kJ
Time = 9 minutes