P303 - Efficiency
Authored by Mr Boyle
Science
3rd Grade
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55 questions
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1.
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5 mins • 5 pts
Calculate the useful energy output for a device when its total energy input is 60 kJ and it has an efficiency of 23%.
2.
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5 mins • 5 pts
Calculate the kinetic energy output for a toy car when its battery provides 80 kJ and it has an efficiency of 84%.
3.
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5 mins • 5 pts
Calculate the useful energy output for a light bulb when total energy input is 3000 J and it has an efficiency of 32%.
4.
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5 mins • 5 pts
Calculate the useful energy output for a toaster when total energy input is 51230J and it has an efficiency of 60%.
5.
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5 mins • 5 pts
Calculate the useful energy output for a buzzer when total energy input is 8700 J and it has an efficiency of 3%.
6.
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5 mins • 5 pts
Calculate the total energy output for a device which has an efficiency of 23% and produces 13.8 kJ of useful energy.
7.
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5 mins • 5 pts
Calculate the total energy output for a toy car which has an efficiency of 84% and produces 67200 J of kinetic energy.
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