Energy

Question 1

energy stores

Answer 1

thermal
kinetic
gravitational potential
elastic potential
chemical
magnetic electrostaticic
nuclear

Question 2

what happens if a system changes

Answer 2

the energy is transferred

Question 3

work done

Answer 3

when current flows or by a force moving a object

Question 4

specific heat capacity

Answer 4

substance amount of energy to raise the temperature of 1 kg of the substance by 1* C

Question 5

j - kj

Answer 5

divide by 1000

Question 6

kinetic energy

Answer 6

energy stored in a moving object

Question 7

gravitational potential energy

Answer 7

energy stored due to an objects positon above

Question 8

elastic potential energy

Answer 8

energy stored in stretched spring

Question 9

thermal energy

Answer 9

energy stored due to an objects temp

Question 10

elastic potential energy

Answer 10

energy stored in stretched spring

Question 11

what does friction cause

Answer 11

energy is transferred to thermal energy

Question 11

what does friction cause

Answer 11

energy is transferred to thermal energy

Question 12

reducing unwanted energy transfers

Answer 12

using lubricants on fixed points
removing air particles from the points

Question 13

reducing unwanted energy transfers

Answer 13

using lubricants on fixed points
removing air particles from the points

Question 14

mechanical work

Answer 14

using a force to move an object

Question 15

electrical work

Answer 15

a current transferring energy

Question 16

electrical work

Answer 16

a current transferring energy

Question 17

work done equation

Answer 17

work done (j)=force (n) times distance (m)

Question 18

work done equation

Answer 18

work done (j)=force (n) times distance (m)

Question 19

work done equation

Answer 19

work done (j)=force (n) times distance (m)

Question 20

work done equation

Answer 20

work done (j)=force (n) times distance (m)

Question 20

work done equation

Answer 20

work done (j)=force (n) times distance (m)

Question 21

work done equation

Answer 21

work done (j)=force (n) times distance (m)

Question 22

power equations 1

Answer 22

power w = energy transferred j / time s

Question 23

power equation 2

Answer 23

power w = work done j /time s

Question 24

efficiency equation 1

Answer 24

efficiency = useful output energy transfer/ total input energy transfer

Question 25

efficiency equation 2

Answer 25

efficiency =

Question 26

efficiency equation 2

Answer 26

efficiency = useful power output/

Question 27

efficiency equation 2

Answer 27

efficiency = useful power output/ total power input

Question 28

thermal conductivity

Answer 28

higher the conductivity of a material the higher rate of energy transfer by conduction across that material

Question 28

thermal conductivity

Answer 28

higher the conductivity of a material the higher rate of energy transfer by conduction across that material

Question 29

specific heat capacity practical

Answer 29

put beaker o balance and press 0