Energy Transfer Flashcards
What are the 8 energy stores?
1) kinetic store
2) chemical store
3) thermal store
4) gravitational potential store
5) elastic store
6) magnetic store
7) vibration store
8) nuclear store
What is the kinetic store
Moving objects
What is the chemical store?
Reactants combined or to give products
What is thermal store?
Object temperature
What is the gravitational potential store?
Objects alter its distance from another mass
What is the elastic store?
Elastic object is stretched or compressed
What is the magnetic store?
when repelling poles have been pushed closer together or when attracting poles have been pulled further apart.
What is the vibration store?
The amplitude of a mechanical wave is increased or decreased
What is the nuclear store?
Nuclear particles are rearranged
What are the 4 pathways energy can be transferred and what they do?
1) mechanically working- because a force acting on a distance
2) heating by particles- because of a temperature difference
3) electrically- electric current
4) heating by radiation- electromagnetic waves. eg light, infrared
How many joules (J) in 1 kilojoule (KJ) ?
1000 joules in 1 kilojoule
It takes 1 Joule of energy to apply 1 newton of force over 1 meter of distance
How many kilojoules in 1 kilocalories?
1 kilocalorie=4.18 kilojoule
True or false
Energy can be created?
False
Energy cannot be created or destroyed only transferred.
What is temperature?
Temperature: is a measurement of the average kinetic energy of the particles in a substance.
What is thermal equilibrium?
Thermal equilibrium: reached when there is no more temperature difference between the tea and the surroundings. There will be no more energy transferred between the thermal stores.
