P1.2 - Using Energy
- Created by: alishamunson
- Created on: 26-02-17 12:08
View mindmap
- P1.2 - Using Energy
- 2.1
- Energy exists in many forms:
- Light
- Sound
- Kinetic
- Nuclear
- Electrical
- Gravitational Potential
- Elastic Potential
- Chemical
- Energy can be transferred from one form to another.
- Any object above the ground has gravitational potential energy.
- A fall objects transfers GPE to kinetic.
- Energy exists in many forms:
- 2.2
- You cannot destroyed or created, but you can transform it.
- Conservation of energy:
- The total amount of energy is always the same.
- Applies to all energy transfers.
- Energy can be transferred from one form to another.
- 2.3
- Useful energy is energy in the place we want i and the form we need it.
- Wasted energy is energy that is not useful energy.
- Useful energy and wasted energy both end up being transferred to the surroundings.
- As energy spreads out, it gets more and more difficult to use for further energy transfers.
- 2.4
- Efficiency: Useful energy transferred by the appliance / total energy supplied to the appliance (x100)
- No machine can be more than 100% efficient.
- Measurement to make machine more efficient:
- Reduce friction.
- Reduce air resistance.
- Reduce electrical resistance.
- Reduce noise due to vibrations.
- Represented by sankey diagrams:
- 2.1
Comments
No comments have yet been made