Energy Flashcards
(7 cards)
1
Q
Energy
A
The Ability to do wok.
The SI unit is the joule (J)
2
Q
Forms of energy
A
- Thermal (heat energy), cup of hot water
- Chemical energy, food you eat
- Kinetic energy, person running
- Magnetic energy, bar magnet
- Potential energy, stretched elastic band
- Nuclear energy, nucleus of radioactive atom
3
Q
Law of conservation of energy
A
Energy cannot be created or destroyed, but it can change from one form to another.
4
Q
Energy transfer diagram
A
Shows the useful energy transfers taking place in a process
5
Q
Waste
A
Energy transfers that are not useful
6
Q
Sankey Diagram
A
Shows all the energy transfers taking place in a process.
7
Q
Efficiency
A
Calculated to show how close we can get to 100% energy transfer in a device.
Useful energy ÷ Total energy
