anythin!

Question 1

work done

Answer 1

another way of saying energy transferred

Question 2

system

Answer 2

fancy word for single objects or a group of objects you are interested in.

Question 3

closed system

Answer 3

neither matter nor energy can enter or leave .total energy is always zero

Question 4

energy can be transferred in which ways?

Answer 4

mechanically,electrically,heating and radiation

Question 5

conservation of energy principle

Answer 5

energy can be transferred usefully,stored or dissipated,but can never be created or destroyed.

Question 6

density

Answer 6

mass/volume

Question 7

what is needed to melt a solid or boil a liquid?

Answer 7

increase in energy

Question 8

the energy needed to change the state of 1kg of substance from solid to liquid at its melting point is known as….

Answer 8

specific latent heat of fusion lf

Question 9

equation of specific latent heat

Answer 9

change in energy = mass *specific latent heat

Question 10

energy transferred =

Answer 10

temperature change *mass *capacity

Question 11

does an ammeter or volmeter measure current?

Answer 11

ammeter

Question 12

does an ammeter or volmeter measure potential difference

Answer 12

voltmeter

Question 13

does voltmeter go in series or parallel?

Answer 13

parallel

Question 14

power(w)=

Answer 14

potential difference(v)*curent(a)

Question 15

current

Answer 15

charge / time taken

Question 16

potential difference =

Answer 16

current * resistance

Question 17

what is temperature a measure of?

Answer 17

average kinetic energy

Question 18

energy lost from gpe store=

Answer 18

energy gained in kinetic store

Question 19

what is specific heat capacity

Answer 19

the amount of energy needed to raise the temperature of 1kg of a substance by 1c

Question 20

power is..

Answer 20

rate of energy transfer or doing work

Question 21

conduction

Answer 21

process by which vibrating particles transfer energy to neighbouting particles

Question 22

thermal insulation

Answer 22

a material providing high restance to heat flow.

Question 23

lubricant

Answer 23

used to reduce the friction between the objects surfaces when they move

Question 24

efficiency

Answer 24

transfer energy from one energy store to a more useful one.

Question 25

equation of efficiency =

Answer 25

useful output energy transfer / total input energy transfer

Question 26

how can you improve efficiency

Answer 26

by insulating objects

Question 27

non renewable energy resources examples

Answer 27

coal,oil,natural gas and nuclear fuels(uranium and plutonium)

Question 28

renewable energy resource examples

Answer 28

wind,water waves,tides,hydroelectricity,the sun(solar), geothermal and bio fuel

Question 29

renewable energy resource examples

Answer 29

wind,water waves,tides,hydroelectricity,the sun(solar), geothermal and bio fuel