Forms Of Energy Flashcards
What is energy?
Quantity related to work
What is potential energy?
Stored energy that has potential to turn into another type of energy
What is gravitational potential energy?
Energy of an object at a height
What objects are affected by gravitational potential energy?
Aeroplanes, kites and mugs on a table
Anything evevated
What is magnetic energy?
Energy stored when repelling polesd have been pushed closer together
Energy stored when attracting poles have been pulled further apart
What objects are affected by magnetic energy?
Fridge magnets
Compasses
Maglev trains
What is thermal(internal) energy?
Total kinetic and potential energy of particles in an object
In hotter objects particles have more internal energy and vibrate faster
What contains thermal energy?
Human bodies
Hot coffee
Stoves or hobs
Ice particles but they vibrate slower
What is chemical energy?
Energy stored in chemical bonds
What contains chemical energy?
Food
Muscles
Electrical cells
What is kinetic energy?
Energy of a moving object
What contains kinetic energy?
Runners
Buses
Comets
All moving objects
What is electrostatic energy?
Energy stored when repelling charges have been moved closer together
Energy stored when attracting charges are pulled further apart
What contains electrostatic energy?
Thunderclouds
Van de graff generators
What is elastic potential energy?
Energy stored when an object is stretched or squashed
What contains elastic potential energy?
Drawn catapults
Compressed springs
Inflated balloons
What is nuclear energy?
Energy stored in the nucleus of an atom
What contains nuclear energy?
Uranium nuclear power
Nuclear reactors
What is a system?
Am object or a group of objects
What is an example of energy transfer with a swinging ship?
Kinetic energy is transferred to gravitational potential energy in the sky
What is an example of energy transfer using a boat?
Chemical energy from fuel being burned gets turned into kinetic energy as the engine pushes it forward
What is mechanical work
Force moving an object through a distance
What is electrical work
Charges moving due to a potential difference
What causes heating
Due to temperatures difference between objects
How does transferring energy with radiation work
Energy transferred as a wave ,
light and infrared radiation are emitted from the sun as waves
What is work
Scientific term for saying energy has been transferred
What is energy dissipation?
When energy is wasted in a change of energy in a system
How is energy dissipated in a mechanical system?
When two surfaces rub together
Friction
How does internal energy of surfaces increase in mechanical systems?
Work is done against friction which heats the surfaces
How can you reduce heat loss with friction?
Adding lubricant
What is conservation of energy?
Energy can be transferred usefully, stored or dissipated but never created or destroyed
