P7

Question 1

what is the gravitational energy store

Answer 1

an object placed in a gravitational field has GPE

if filled up by separating two masses

Question 2

what is chemical store

Answer 2

energy stored in chemical bonds

Question 3

what is electrostatcic energy store

Answer 3

the energy stored when two like charges are held together or two opposite charges are pulled apart

Question 3

what is electrostatcic energy store

Answer 3

the energy stored when two like charges are held together or two opposite charges are pulled apart

Question 4

what is nuclear store

Answer 4

atomic nuclei join or split to release energy

fission or fusion

Question 5

what is nuclear store

Answer 5

atomic nuclei join or split to release energy

fission or fusion

Question 6

what is the magnetic store

Answer 6

two magnets will attract or repel each other

filled up by changing the separation of the magnets

Question 7

example of energy transfer by radiation

Answer 7

kinetic energy or a speaker is transfered by sound to thermal energy of the air

Question 8

list two common causes of how energy dissapates

Answer 8

friction
sound

thermal store increases

Question 9

what is conduction

Answer 9

only ahppens in solids
KPE of particles increases as they get hotter
collide with particles near and transfer energy

Question 10

what is convection

Answer 10

only in fluids
hotter particles gain energy and move faster and apart
expand become less dense
rises
convenction current

Question 11

what is radiation

Answer 11

can travel through vacuum
hotter objects emit more infrared
black = best emiter and absorber
shiny = good reflectors