1. Where does the energy in a circuit come from?
- the current flowing through it
- fossil fuels
- the national grid
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Other questions in this quiz
2. true or false: more efficient machines waste less energy?
3. What are sankey diagrams?
- energy transformation diagrams
- diagrams used to measure the cost of a machine/appliance
4. If something supplies energy it also supplies what?
5. true of false: some energy is always lost?
- false-it's all converted into different forms
- true- some is useful energy and the rest is lost energy