Energy Transfers

Question 1

what are the 8 main types of energy transfer?

Answer 1

thermal, kinetic, gravitational potential, elastic, chemical, magnetic, electrostatic and nuclear

Question 2

what is an open system in energy transfers?

Answer 2

-matter of the system can exchange energy with the ‘outside world’
-can lose or gain energy as it interacts with the ‘outside world’

Question 3

what is a closed system in energy transfers?

Answer 3

-separate from the outside world
-neither matter, nor energy can enter or leave
-overall change is always 0

Question 4

what are the two types of work done?

Answer 4

mechanical and electrical

Question 5

what is mechanical work done?

Answer 5

force to move an object e.g. kicking a ball (chemical energy store of the leg), kinetic energy store of the ball being transferred

Question 6

what is electrical work done?

Answer 6

when current flows - energy required to overcome the resistance in the wires of a circuit