| A | B |
|---|
| Joule | One newton-meter is equal to one of theses |
| Work | Force times distance |
| horsepower | A unit of power; equal to 746 Watts. |
| Power | The amount of work performed over time. |
| Efficiency | The ratio of work output to work input |
| Perpetual motion machine | An imaginary machine that can be 100 percent effiecient. |
| Law of Conservation of energy | Energy is never created or destroyed. |
| Energy | The ability to do work |
| Electrical energy | Another term for electricity. |
| Kinetic energy | Energy that comes from motion. |
| Nuclear energy | The form of energy that comes from splitting the nucleus of an atom, or fusing two nuclei of an atom. |
| Potential energy | Stored energy that comes from position. |
| Radiant energy | Another term for electromagnetic energy. |
| Chemical energy | A type of energy stored in molecules. |
| Energy transformations | The conversion from one kind of energy to another kind of energy. |
| heat | The flow of thermal energy from one object to another object due to a temperature difference. |
| radiation | The processs of emitting radiant energy |
