Energy Flashcards
What are the 5 main energy stores?
- Chemical
- Kinetic
- Thermal
- Gravitational potential
- Elastic potential
How do you calculate efficieny of energy transfer?
Useful energy / Total energy
What is power?
The rate at which energy is transferred.
What is work done?
Energy transferred.
What is gravitational energy?
The energy stored in an object raised above the ground.
What is kinetic energy?
Energy stores in a moving object.
What 3 factors effect the rate of energy transfer through a material?
- The temperature difference
- The thickness of the material
- The thermal conductivity of the material
Why do warm fluids rise?
Their particles have more energy, so they move apart, this reduces the density of the fluid, causing it to rise above more dense fluids.
What coloured surfaces are the best absorbers and emitters of infrared radiation?
Black mat surfaces.
What are the environmental impacts of burning coal?
- Carbon dioxide (global warming)
- Sulfur dioxide (acid rain)
What are the environmental impacts of burning oil?
- Carbon dioxide (global warming)
- Sulfur dioxide (acid rain)
- Potential oil spills
What are the environmental impacts of burning gas?
- Carbon dioxide (global warming)
