AQA GCSE Physics unit 1.2 Efficiency

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  • Energy and efficiency
    • Energy can be transferred but cannot be created or destroyed (principle of conservation of energy)
      • Although some can be wasted (transferred into the surroundings which become warmer)
        • Can be passed through a heat exchanger- so heat can be used
    • The efficiency of a device is a measure of the amount of energy that is usefully transferred


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