Physics chapter 6 Flashcards
Define Energy Efficiency
The efficiency of an energy conversion in the fraction of the energy that ends up in the desired form
What are the common forms of waste energy
heat energy and light energy
Formula for calculating efficancy
Useful energy output/ Energy output x 100
SI unit for energy
Joules
Define Gravitational Potential energy
Gravitational potential energy is energy an object possesses because of its position in a gravitational field
Formula for Gravitational Potential energy
Mass x Height x Gravity
Name 10 types of energy
1.. Kinetic Energy
2. Gravitational potential energy
3. Chemical Energy
4. Electrical Energy
5. Nuclear Energy
6. Strain/Elastic Energy
7. Internal Energy
8. Thermal (Heat) Energy
9. Light Energy
10. Sound Energy
Features of Energy
- It can be transfered
- It can not be created or destroyed
- It can be stores
Does Energy dissipated
Energy tends to dissipate during an energy change
Define principal of conservation of energy
Total amount of energy before and after the conversation is constant.
The main sources if chemical energy
Food, Fuel and battery
What can chemical energy change into?
Sound, light, thermal, kinetic, Electrical.
Define Electrical Energy.
Electrical Energy is a form of energy resulting from the flow of electric charge.
What is Nuclear energy?
The energy releases through nuclear Fission and Fusion.
Define Strain/Elastic energy.
Energy stored by an object that has been stretched or squashed in an elastic way.
