880302
Description
Flashcards by kensa waddington, updated more than 1 year ago
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Created by kensa waddington
over 10 years ago
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| Question | Answer |
| Wave speed. | You calculate the wave speed by Frequency multiplied by the wavelength. or. Distance divided by time. |
| Electrical power. | Current multiplied by potential difference gives you the electrical power. |
| Cost of electricity. | Power multiplied by time(hour) multiplied by cost of 1 kilowatt-hour. |
| Power. | To get the power you need to do energy used divided by time taken. |
| Efficiency. | To get the efficiency you need to do. Useful energy transferred by the device divided by total energy supplied to the device then you multiply the answer by 100. |
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