Printable worksheet ยท 1 of 4
Account for useful and less useful transfers - Paper 1
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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A fictional device receives 400 J and provides 160 J of output useful for its stated purpose. All other output is less useful for that purpose. Efficiency = useful output / total input. Treat the device and surroundings as an energy-accounting model; energy is transferred, not destroyed.
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