P7.2.5 - Efficiency Flashcards
1
Q
What is efficiency?
A
The ability to transfer energy better than other products
2
Q
What is the equation used to calculate efficiency?
A
Efficiency = useful output energy transfer / input energy transfer
3
Q
Why are no appliances 100% efficient?
A
Because energy is always dissipated
4
Q
What diagram do you use to show efficiency?
A
Sankey diagram
5
Q
Describe how Sankey diagrams are used.
A
Each arrow’s width shows much how is used, each type of energy gets their own arrow
