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AQA AS PHYSICS 7407/1 Paper 1 Mark scheme Latest Updated 2024
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AQA AS PHYSICS 7407/1 Paper 1 Mark scheme Latest Updated 2024 radioactive contamination - the unwanted presence of materials containing radioactive materials how much of our background radiation is from the air(radon) - 50% how much of our background radiation is medical - 14% how muc...
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