Energy Flashcards
0
Q
What is wasted energy?
A
Wasted energy is energy that is not wanted or not usefully transferred.
1
Q
What is useful energy?
A
Useful energy is energy transferred to where it is wanted, in the form it’s wanted.
2
Q
What is the efficiency?
A
Useful energy transferred by a device/ total energy supplied by the device .
3
Q
What does a Sankey Diagram show?
A
A Sankey diagram shows how many energy is transferred usefully and how much is wasted for a appliance.
4
Q
What is the efficiency limit?
A
No machine can be more than 100% efficient because we can never get more energy from a machine than we put into it.
5
Q
What is the rule of conservation of energy.
A
All energy flows and never disappears.
