Energy transfers and efficiency 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: MillieCreated on: 12-05-13 15:20 (Fill in the words): Energy cannot be ________ or ________ Created or destroyed 1 of 5 What is the word used for only part of the total energy is transferred? 'Wasted' 2 of 5 How would you calculate the efficiency of a device? efficiency= useful energy/power out (over/divided) total energy/power in (x 100%) 3 of 5 Where is wasted energy transferred to and how does it become less useful? It transfers to the surrounding and it becomes increasingly spread out and so becomes less useful 4 of 5 What is a Sankey diagram? A diagram showing you where the energy in an appliance goes 5 of 5
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