Across
- 5. Useful energy / total energy in x 100
- 6. Power is measured in these
- 7. An object that allows heat or electricity to flow through it
- 9. Another word for heat energy
- 10. The useful energy from a speaker
Down
- 1. This is what energy is measured in
- 2. Something that reduces friction
- 3. This causes wasted heat energy on a door hinge
- 4. These do not conduct electricity or heat
- 8. The wasted energy of a car moving at 50mph