Physics Paper One (Topics 1 - 4)
TOPIC ONE -- ENERGY
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TOPIC 1A - ENERGY TRANSFER
energy stores
kinetic
thermal
chemical
gravitational potential
elecrostatic
elastic potential
magnetic
nuclear
energy transfers
SYSTEM-- an object or group of objects
CLOSED SYSTEMS-- systems where neither matter nor energy can enter and leave
can be transferred in four ways
mechanically
electrically
due to a force acting on it
pushing, pulling,stretching or squashing
current through a potential difference
charges moving in a circuit
heating
heat transferred from hot to cold
heating a pan of water on a hob
radiation
energy transferred by light/sound waves
sun giving off heat
work done
is equal to energy tranferred
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