Energy

Question 1

kinetic energy store?

Answer 1

object is moving

Question 2

thermal energy store

Answer 2

object is heated. more heat more energy

Question 3

gravitational potential

Answer 3

mass and inside a gravitational field

Question 4

chemical energy store

Answer 4

chemical reactions

Question 5

elastic potential

Answer 5

stretched or compressed

Question 6

electrostatic

Answer 6

electric charge interacting with electric charge

Question 7

magnetic

Answer 7

magnet interacting with magnet

Question 8

kinetic formula

Answer 8

Kinetic Energy (j) = 1/2 x mass (kg) x speed² 9m/s

Question 9

small mass, slow speed…?

Answer 9

small amount of kinetic energy

Question 10

big mass, high speed…?

Answer 10

large amount of kinetic energy

Question 11

Is someone is dropped which store is the energy transferred to from gravitational potential?

Answer 11

Kinetic energy

Question 12

Gravitational potential energy formula?

Answer 12

Gravitational energy = mass (kg) x field strength (n/m) x height (m)

Question 13

Elastic potential energy formula?

Answer 13

Elastic energy = 1/2 x spring constant (n/m) x extension (m)

Question 14

what is spring extension?

Answer 14

the length (m) of how much the spring stretches

Question 15

which ways can energy transfer?

Answer 15

mechanically, electrically, thermally, radiation

Question 16

what is power?

Answer 16

how quickly an energy is transferred from one form to another

Question 17

what is power measured in?

Answer 17

watts

Question 18

are power and work done the same?

Answer 18

no

Question 19

formula for power?

Answer 19

power = energy transferred (j) /time (s)

Question 20

when is energy transferred called work done?

Answer 20

when moving an object over a distance is involved

Question 21

are energy transferred and work done the same?

Answer 21

yes

Question 22

what is the conservation of energy?

Answer 22

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

Question 23

what does dissipated mean?

Answer 23

when energy is wasted

Question 24

formula for efficiency?

Answer 24

useful output energy transfer / total input energy transfer x 100