What are the 8 main energy stores?
Chemical, kinetic, gravitational potential, elastic, thermal, magnetic, electrostatic, nuclear
What are examples of chemical energy?
Fuel, food, battery
What are examples of kinetic energy?
What are examples of gravitational potential energy?
What are examples of elastic energy?
What are examples of thermal energy?
What are examples of magnetic energy?
What are examples of electrostatic energy?
What are examples of nuclear energy?
In what 4 ways is energy transferred from one store to another?
Mechanically, electrically, thermal, radiation
The rate at which thermal energy is transferred through the wall of a house depends on what?
The difference in temperature between inside and outside, the thickness of the walls, the material the walls are made of
What is the equation for efficiency?
Useful energy transferred by the machine/total energy supplied to the machine
What are non-renewable energy resources?
Resources that will eventually run out, they are available all the time
What are examples of non-renewable energy resources?
Nuclear fuels, fossil fuels
What are renewable energy resources?
They do not run out, do not cause pollution or emit carbon dioxide
What are examples of renewable energy resources?
Solar cells, bio-fuels, hydroelectricity, tidal power, wind turbines
What is the equation for the change in gravitational potential energy?
Mass x change in gravitational field strength x change in vertical height
What is the equation for kinetic energy?
1/2 x mass x speed^2