429 prompts matching "What radioactivity is, and why some nuclei are unstable"
Worked example: Calculating the impulse delivered in a collision
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Spot my mistake: Ignoring direction when adding momenta
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Real-life Nigeria: Crumple zones and safety in Nigerian vehicles
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Practice set: Sankey diagrams and how to read them
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Spot my mistake: Describing energy as being used up
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Exam timing: A timed set of energy and efficiency questions
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Practice set: The pulley system and its velocity ratio
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Exam prep: The inclined plane, the screw, and the wheel and axle
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Spot my mistake: Assuming a machine can be one hundred per cent efficient
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Real-life Nigeria: Simple machines on Nigerian farms and in workshops
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Quiz: The melting point and the boiling point
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Practice set: Evaporation, and how it differs from boiling
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Spot my mistake: Assuming evaporation happens only at the boiling point
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Practice set: Cubic expansivity and superficial expansivity
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Exam prep: The anomalous behaviour of water between zero and four degrees
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Spot my mistake: Forgetting to convert units before an expansivity calculation
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Real-life Nigeria: Expansion gaps in Nigerian bridges and railways
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Quiz: Conduction and the particles that carry it
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Practice set: Radiation, and the surfaces that emit and absorb best
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Spot my mistake: Claiming that radiation needs a medium
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