Energy Stores and Transfers Flashcards
How many stores of energy are there?
7
What are the 7 stores of energy?
Kinetic energy
thermal energy
elastic potential energy
gravitational potential energy
chemical energy
magnetic energy
electrostatic energy
what is kinetic energy?
all moving things store kinetic energy eg. a rollercoaster
what is thermal energy?
the energy a substance stores because of its temperature eg. hot drinks, fire
what is elastic potential energy?
the energy stored in a springy object when you stretch or squash it eg. a hairband
what is gravitational potential energy?
the energy stored in an object because of its position above the ground eg. a swimming diver
what is chemical energy?
energy stored in a fuel eg. a battery
what is magnetic energy?
magnetic fields
what is electrostatic energy?
static energy
how many types of energy transfers are there?
4
what are the 4 types of energy transfers?
mechanical working
electrical working
heating by particles
heating by radiation
what is mechanical working?
it involves a force, includes sound waves and surfaces being in contact
what is electrical working?
it’s via a current (through wires)
what is heating by particles?
heat moving from one place to another via conduction and convection
what is heating by radiation?
heat radiation and any electromagnetic waves (light waves)
what is the principle of the conservation of energy?
energy can not be created or destroyed, only transferred from one store to another
what stores and transfers are happening in a kettle boiling?
electrical working
thermal energy store of the heating element
heating by particles
thermal energy store of the water
what stores and transfers are happening when a ball is thrown into the air?
chemical store of the arm muscles
mechanical working
kinetic energy store of the arm and the ball
mechanical working
gravitational potential energy store of the ball
what stores and transfers are happening when a ball is dropped from a height?
gravitational potential energy store of the ball
mechanical working
kinetic energy store of the ball
what stores and transfers are happening when a car brakes?
kinetic energy store of the car
mechanical working
thermal energy of the brakes and tires
heating by particles
thermal energy store of the surroundings
what stores and transfers are happening when a moving object collides with a stationary one?
kinetic energy store of the moving object
mechanical working
mechanical working - sound waves (wasted)
thermal energy store of the moving and stationary object
