Energy Transfers Flashcards
(5 cards)
1
Q
What is a closed system?
A
A system where neither matter nor energy can enter or leave.
2
Q
How can energy be transferred?
A
Mechanically
Electrically
By heating
By radiation
3
Q
What is work done?
A
Another way of saying how much energy is transferred.
4
Q
The conservation of energy principle.
A
Energy can be transferred, used or dissipated, but never created nor destroyed.
5
Q
What happens to ‘wasted’ energy?
A
It’s dissipated and usually put into a thermal store.
