3925224
Description
Flashcards by Alex Nolan, updated more than 1 year ago
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Created by Alex Nolan
over 8 years ago
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| Question | Answer |
| What is kinetic energy? | Energy of an object due to its motion. |
| What is gravitational potential energy? | Energy of an object due to its position. |
| What is chemical energy? | Energy stored in a substance and realised when chemical reactions take place. |
| What is electrical energy? | Energy transferred by an electric current. |
| What is elastic strain energy? | Energy stored in an elastic object when we stretch or squash it. |
| What is nuclear energy? | Energy released when a nucleus of an atom splits or disintegrates. |
| What is internal energy? | Energy of an object due to its internal motion and positions of its molecules. |
| What is heat energy? | Energy transferred from a hot object to a cold object. |
| What is sound energy? | Energy transferred by sound waves. |
| What is light energy? | Energy transferred by light. |
| Does energy transfer in different forms? | Yes. |
| Can energy be changed from one form into other forms? | YES |
| Energy can be transformed from one form to another or transferred from one place to another. True or false? | TRUE |
| Energy can be created but cannot be destroyed. True or false? | FALSE |
| What does a petrol generator consist of? | A petrol engine and an electricity generator. |
| What are electricity generators in power stations driven by? | Turbines. |
| What is the unit of energy? | Joules. |
| What is efficiency? | Efficiency is a measure of how much energy supplied to a device is usefully used. |
| When does nuclear fission occur? | When a uranium nucleus splits as a result of being struck by a neutron. |
| Is energy released in nuclear fission? | Yes |
| What does neuclear fission mean? | when the nucleus of a uranium atom is unstable and can split into in two when a neutron from outside the atom colds with it. |
| Is energy released in nuclear fusion? | yes |
| What is nuclear fusion? | When two nuclei are forced close enough together so they form a single larger nucleus. |
| What is a wind turbine? | Its an electricity generator on top of a tall tower. |
| What is a wave generator? | A floating generator turned by waves. |
| How are hydro-electricity generators turned? | They are turned by water running down hill. |
| How does a tidal power station work? | It traps each high tide and uses it to turn generators. |
| How can solar energy be converted into energy? | Using solar cells or used to heat water directly in solar heating panels. |
| How is geothermal energy realised? | By radio active substances deep inside the earth. |
| What is the equation for work done? | Force X distance |
| Equation for kinetic energy? | 1/2 X m X v (squared) v = speed m= mass |
| What is the equation for gravitational potential energy? | m X g X h m = mass g = gravity h = vertical distance moved |
| What is the unit of power? | watt (W) |
| watt is equal to 1 J/s True or false | True |
| How many watts are in 1 kilowatt? | 1 kilowatt= 1000 watts |
| What is the equation for power (in watts)? | Energy transferred _________________ Time taken |
| All types of energy are measured in? | WATTS |
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