P1 Energy Flashcards
What are the 10 energy types?
-Magnetic
-Kinetic
-Gravitational potential
-Elastic Potential
-Electrical
-Chemical
-Nuclear
-Thermal
-Sound
-Light
What are the energy stores
magnetic
internal (thermal)
chemical
kinetic
electrostatic
elastic potential
gravitational potential
nuclear
what are the energy transfers
mechanical work - a force moving an object through a distance
electrical work - charges moving due to a potential difference
heating - due to temperature difference caused electrically or by chemical reaction
radiation - energy transferred as a wave, eg light and infrared - light radiation and infrared radiation are emitted from the sun
What is meant when people say ‘energy is lost’?
It is transferred or stored as non-useful energy.
Can energy be created or destroyed?
Energy cannot be created or destroyed, just changed from one form to another.
What is the equation for kinetic energy?
Kinetic Energy = 0.5 x mass x speed^2
Ek = 0.5 x m x v^2
What is the equation for gravitational potential?
Gravitational Potential Energy = mass x gravitational field strength x height
Ep = m x g x h
What is the equation for work?
Work = Force × Distance
What is the equation for power and what is it?
Power is the rate of doing work.
P=W/T
What is the equation for efficiency
Efficiency= Output work/ Input work x 100%
What is temperature measured in and what is heat measured in?
T= C
H= J
What are energy resources?
Energy resources are the opportunities an area offers to generate electricity based on its natural conditions and circumstances.
What is thermal conductivity
A high thermal conductivity means that there is a high rate of heat transfer through the material.
When is work done?
work is done when a force acts on something and makes it move
