899517
Description
Flashcards by Jawad Karim, updated more than 1 year ago
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Created by Jawad Karim
about 8 years ago
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| Question | Answer |
| How many energy types are there? | 7 |
| What are they? | Kinetic Heat Electrical Light GPE Chemical Elastic Nuclear |
| What is the law of conservation? | Energy can never be created or destroyed. It is only CONVERTED to different forms |
| GPE increases with... | height |
| KE increases with... | speed |
| Electrical 200J Input Light 100J Output Sound and Light? | 50J each |
| How do you calculate efficiency? | Useful Energy Output divided by Total Energy Input all multiplied by 100% (for a percentage) |
| What is a TV designed to do? | Transfer electrical energy into Light and Sound energy |
| So why do we get heat energy too? | Because that energy is wasted. |
| What is another name for an electrical generator? | A Dynamo. |
| What is the formula for power? | Efficiency divide by Total Input |
| How do you calculate GPE energy? | mXgXh m=mass g= gravitational field strength h=height |
| How do you work out Energy? | Energy= power X time |
| What is a Watt? | A measure of Joules per seconds. J/s |
| What is a Kilo-Watt? | A thousand of these.... so-called Watts |
| There are two measures for Energy, power and time. What are they? | E=p X t (J)=(w) X (s) and... (KWh)=(Kw) X (h) |