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Unit 5:Energy
Term | Definition |
---|---|
Energy | The ability to do work or cause a change. |
Law of conservation of energy | Energy cannot be created or destroyed, it can only be transferred. |
Open system | A system that continuously interacts with its surrounding. |
Closed system | A system that can exchange energy,but not matter,with its surroundings. |
Electricity | The continuous flow of electric charges through a conductor. |
Electron | A negatively charged particle located on the outside the atom's nucleus. |
Electric circuit | A closed path through which an electric current flows or may flow. |
Electric Current | A flow of electric charge. |
Voltage | The difference in electric potential energy between two places in a circuit. |
Resistance | The measurement of how difficult it is for charges to flow through a material. |
Electromagnetic Spectrum | The range of seven types of waves that carry energy as electricity and magnetism. |
Medium | A substance through which a wave travels. |
Wave speed | The speed of a wave is determined when both frequency and wavelength are known. S= λf |
Wave | A disturbance that transfer energy from one place to another without requiring matter to move the entire distance. |