energy stores + transfers

Question 1

what’s a system?

[example included]

Answer 1

an object or group of objects.

e.g. an apple on a table.

Question 2

what occurs when there’s a change in a system?

[example included]

Answer 2

energy is transferred between objects or between stores.

e.g. if the table = removed = apple will fall - as the apple falls, energy is transferred.

Question 3

what’s the unit for energy?

Answer 3

joules (J).

Question 4

what can a system be?

state 3.

Answer 4

▸ open - allows the exchange of energy + matter to or from its surroundings.
▹ closed - can exchange energy but not matter to or from its surroundings.
▸ isolated - doesn’t allow the transfer of matter + energy to or from its surroundings.

Question 5

where’s energy stored?

Answer 5

in objects.

Question 6

what does the principle of conservation of energy state?

Answer 6

energy cannot be created nor destroyed, it can only be transferred from one store to another.