Energy Resources and Energy Transfers Flashcards
Name all 8 energy stores?
1) Kinetic
2) Thermal
3) Chemical
4) Gravitational Potential
5) Elastic Potential
6) Electrostatic
7) Magnetic
8) Nuclear
What are the four energy stores?
1) Mechanically
2) Electrically
3) Heating
4) Radiation
What is the principle of conservation of energy?
Energy can be stored, transferred between stores, and dissipated - but it can never be created or destroyed. The total energy of a closed system has no net change
What is the formula for efficiency?
Useful energy output/ total energy output times 100%
How does thermal radiation work?
Transfer of energy by heating by infrared electromagnetic waves
How does conduction work?
Vibrating particles transfer energy from their energy store to the kinetic energy stores of neighbouring particles
How does convection work?
More energetic particles move from the hotter region to the cooler region and transfer energy as they do
How can you reduce the rate of unwanted energy transfer?
Insulation
What is the formula for work done?
Force * distance moved
Work done is equal to ….?
Energy transferred
What is the formula for gravitational potential energy?
Mass * gravitational field strength * height
What is the formula for kinetic energy?
1/2 * mass * speed^2
What is the definition of power?
Rate of transfer of energy or the rate of doing work
What is the formula for power?
Work done/ time taken
What are the seven main ways to produce energy on a large scale?
1) Wind
2) Water
3) Geothermal resources
4) Solar heating systems
5) Solar cells
6) Fossil fuels
7) Nuclear power
