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- 1. Multiple Choice
Where does most of the energy go in this transformation.Electrical energyLightHeatother - 2. Multiple ChoiceWhere does most of the energy go for this transformation.heatelectricallightjoules
- 3. Multiple Choice
What is this diagram called?
Stankey Diagram
Sankey Diagram
Sankay Diagram
Samkay Diagram
- 4. Multiple Choice
The energy efficiency shown in this diagram is:
About 10%.
About 30%.
About 60%.
Impossible to tell.
- 5. Multiple ChoiceWhat type of device might this Sankey be about?A very efficient LED light bulbA very inefficient incandescent light bulbA coal power plantA wind turbine
- 6. Multiple ChoiceWhat might a title be for this sankey?Electrical energyEfficient light bulb25 Joules of heatSankey for a good heater.
- 7. Multiple Choice
Assume there are 10 Joules of energy. Which is a close approximation to the number of Joules that transform into kinetic energy?
1
3
6
10
- 8. Multiple ChoiceWhich fraction best describes, of the part of the gasoline that is put into a car, that actually makes the car move.4/101/42/43/5
- 9. Multiple Choice
A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?
100%
7%
93%
95%
- 10. Multiple Choice
A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?
5%
50%
55%
100%
- 11. Multiple Choice
A hairdryer uses 300J of energy to produce 60J of sound energy and 240J of thermal energy. Calculate it's efficiency.
80%
90%
20%
100%
- 12. Multiple Choice
An iPhone charger coverts 75J of electricty in to 50J of charge and 25J of thermal energy. How efficient is the charger?
10%
100%
33%
67%
- Answer choicesTagsAnswer choicesTags