Energy Transfers and Efficiency Flashcards
(9 cards)
1
Q
What happens to Energy?
A
It Converts.
2
Q
What type of energy is also called movement?
A
Kinetic.
3
Q
Which type of appliance would convert electrical energy into sound energy?
A
A speaker.
4
Q
What type of diagram is used to show energy efficiency?
A
Sankey Diagram.
5
Q
How do we calculate percentage efficiency?
A
(total energy out ÷ useful energy in) x 100.
6
Q
What are the units for energy?
A
Joules.
7
Q
What is the main useful energy transfer that happens in cars?
A
chemical (in the fuel) to kinetic to turn the wheels
8
Q
What energy transfer happens in many musical instruments?
A
Kinetic to sound.
9
Q
What is the main type of energy transfer in a catapult?
A
Elastic potential to kinetic.
