What is the equation for Gravitational Potential Energy? (GPE)
GPE (J) = mass (kg) x gravitational field strength (N/kg) x height (m) GPE = m x g x h
1 of 8
What is the equation for Kinetic Energy? (KE)
Kinetic Energy (J) = 1/2 x mass (kg) x speed2 (m/s) KE= 1/2 x m x v2
2 of 8
What is meant by conservation of energy?
Conservation of energy means energy is never created or destroyed. 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.
3 of 8
Energy transfers
Energy can be transferred between stores in four main ways: *Mechanically- a force acting on an object *Electrically- a charge doing work against resistance *By heating- energy transferred from a hotter object to a colder object...
4 of 8
Energy transfers (continued)
*By radiation- energy can be transferred by waves
5 of 8
What is the equation for efficiency?
efficiency = useful energy transferred by the device ÷ total energy supplied to the device
6 of 8
What are renewable energy sources? Name some examples
Renewable enrgy sources are energy sources which can never run out. Some examples are: *Geothermal *Solar *Biomass *Water *Wind
7 of 8
What are non renewable energy sources? Name some examples
Non renewable energy sources are energy sources which will eventually run out. Some examples are: *Natural Gas *Coal *Oil *Nuclear
8 of 8
Other cards in this set
Card 2
Front
What is the equation for Kinetic Energy? (KE)
Back
Kinetic Energy (J) = 1/2 x mass (kg) x speed2 (m/s) KE= 1/2 x m x v2
Comments
No comments have yet been made