P1 : Energy Stores and Systems Flashcards
What is a system
An object or a group of objects
What happens when a system changes
The energy in the system changes as well, as it is transferred from one store to another
What is the principle of conservation of energy
Energy cannot be created or destroyed, only transferred from one store to another
What are the 8 energy stores
Chemical, kinetic, gravitational potential, elastic potential, thermal, magnetic, electrostatic , nuclear
chemical
Fuels, food or batteries
Kinetic
Moving objects
Gravitational potential
Objects above the ground
Elastic potential
Objects that are stretched or squashed
Thermal energy
Temperature
Magentic
Magnets
Electrostatic
Due to electric charges repelling or attracting
Nuclear
When nuclei inside atoms join or separate
Wasted energy
Energy that is transferred to unwanted stores of energy. This is by raising the thermal energy store of the surroundings
Unit of energy
Joules
