energy transfers Flashcards
eight main stores of energy
- magnetic
- internal (thermal)
- chemical
- kinetic
- electrostatic
- elastic potential
- gravitational potential
what is magnetic energy?
it is the energy stored repelling poles have been pushed closer together or when attracting poles have been pulled further apart
what is internal (thermal) energy?
total amount of kinetic energy and potential energy of all the particles in a given system. the particles speed up and vibrate more which increases heat
what is chemical energy?
the energy stored in chemical bonds
what is kinetic energy?
the energy of a moving object
what is electrostatic energy?
the energy stored when repelling charges have been moved closer together or when attracting charges have been pulled further apart (thunderclouds)
what is elastic potential energy?
the energy stored when an object object is stretched or squashed
what is gravitational energy?
the energy of an object at height, examples are airplanes etc…
what is nuclear energy?
the energy stored in the nucleus of an atom
what are energy pathways?
when energy is transferred from one store to another (one empties and one fills) there is a process called a pathway
four main energy pathways
mechanical work
electrical work
heating
radiation
how does mechanical and electrical work happen?
mechanical is an actual force moving an object through a distance
electrical work is the charges moving due to a potential difference
how does heating and radiation happen?
heating is due to the temperature difference caused electrically or by chemical reaction
radiation is energy transferred as a wave (light and sound)
what is the conservation of energy?
energy cannot be destroyed or created but it can be transferred usefully, stored and dissipated (where we can’t collect it). dissipated is also known as wasted energy.
sankey diagram
it starts off with an energy source then there are arrows showing the energy transfers, the useful energy output goes straight and the wasted energy goes down
