Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Energy 1 pg 38- 39
Energy 1 pg 38
| Question | Answer |
|---|---|
| Energy | A quantity that is stored within objects. The units are Joules |
| Work | Work is done when energy changes from one store to another |
| Dissapated | Becomes spread out to the surroundings and becomes less useful forms of energy stores |
| Specific heat capacity | The energy required to raise the temperature of 1kg of a substance by 1 degree c. |
| kinetic energy store | The energy stored in objects are moving. It is increased when an object speeds up |
| Gravitational Potential Energy Store | The energy stored in objects are raised off the ground |
| Chemical energy store | energy stored in fuels like wood, methane gas or food |
| elastic potential energy store | the energy stored in objects that are stretched of squashed |
| Nuclear Energy Store | Energy stored in the nucleus of an atom |
| Thermal Energy Store | Energy stored in an object due to its temperature. The higher the temperature the higher the energy store |
| Energy Transfer Pathways | This is how energy transfers from store to store |
| Mechanical | When energy is transferred from one store to another by a force |
| Electrical | When energy is transferred from one store to another using an electrical current |
| Heating | When energy is transferred from one store to another through heating |
| Waves | When energy is transferred from one store to another through waves (i.e light or sound) |
| Law of conservations of energy | Energy cannot be created or destroyed, only transferred from one store to another |
| Power | The rate of energy transfer or the rate of work done. Power is measured in watts. |
| Efficiency | The proportion of energy that is transferred usefully in a closed system. Efficiency is a decimal or a percentage. |
| Absorber | An object that soaks up or absorbs energy |
| Emitter | An object that radiates energy into the surroundings |
| Power measurement (W) | Energy (J) divided by time (s) |
| What are the best emitters? | Dull, black objects. They are called black bodies. |
| Efficiency formula | Useful energy output divided by total energy output |
Created by:
Cabezablanca
Popular Science sets