Efficiency Flashcards
1
Q
What is efficiency?
A
Percentage that shows how well a device or process transfers energy in the way you want
2
Q
How do you calculate efficiency?
A
efficiency = (useful output energy transfer / input energy transfer) x 100
3
Q
Why are no devices 100% efficient?
A
Energy is always dissipated, some ends up in the thermal store of surroundings
4
Q
How do you increase efficiency?
A
Use insulation
Make devices from materials that reduce unwanted energy transfer
Use technology to produce devices that are better at their job
5
Q
What type of diagram can you use to show efficiency?
A
Sankey diagram
