217 prompts matching "Why matter expands when it is heated"
Let me explain: The factors that determine the size of the force
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Worked example: Calculating the force on a current-carrying conductor
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Real-life Nigeria: Electric motors in Nigerian homes and industry
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Let me explain: Step-up and step-down transformers
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Worked example: Calculating output voltage from the turns ratio
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Real-life Nigeria: The nucleus as the source of nuclear energy
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Real-life Nigeria: The hazards of radiation and the precautions taken against them
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Let me explain: The random nature of radioactive decay
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Worked example: Calculating the mass remaining after a number of half-lives
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Worked example: The rotation and the revolution of the earth
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Let me explain: Kepler's laws of planetary motion
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Real-life Nigeria: Eclipses of the sun and of the moon explained
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Let me explain: The life cycle of a star
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Real-life Nigeria: How starlight tells us what stars are made of
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Physics at work: Astronomy as a field of study and of work
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Real-life Nigeria: Telescopes, and how we observe the universe
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Worked example: The earth and the solar system reviewed
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