229 prompts matching "What refraction is, and why light bends"
Quiz: Fleming's left-hand rule
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Exam prep: The simple d.c. motor and how it turns
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Real-life Nigeria: Electric motors in Nigerian homes and industry
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Quiz: The structure of a transformer and its two coils
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Exam prep: Energy losses in a transformer, and how they are reduced
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Spot my mistake: Assuming a transformer can work on direct current
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Real-life Nigeria: Transformers in Nigeria's power transmission network
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Practice set: The Bohr model and electron energy levels
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Spot my mistake: Confusing atomic number with mass number
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Quiz: Telling alpha, beta and gamma radiation apart
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Worked example: Writing an equation for alpha decay and for beta decay
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Practice set: The Geiger-Muller tube and how it detects radiation
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Exam prep: The cloud chamber and the photographic plate as detectors
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Real-life Nigeria: The hazards of radiation and the precautions taken against them
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Quiz: The decay curve, and reading a half-life from it
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Practice set: The decay constant and the activity of a source
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Exam prep: Carbon dating and how it works
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Spot my mistake: Assuming a sample decays completely after two half-lives
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Quiz: The earth's atmosphere and the layers within it
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Worked example: The rotation and the revolution of the earth
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