191 prompts matching "A beam problem solved by taking moments"
Spot my mistake: Drawing the reflected ray on the wrong side of the normal
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Real-life Nigeria: Concave and convex mirrors in Nigerian use
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Worked example: Finding refractive index from a pair of measured angles
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Spot my mistake: Applying Snell's law with the two media the wrong way round
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Real-life Nigeria: Optical fibres and the periscope
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Worked example: Applying the lens formula to find the image position
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Spot my mistake: Mixing up the sign convention for a diverging lens
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Real-life Nigeria: Lenses in the eye and in spectacles
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Worked example: Applying Ohm's law to find an unknown quantity
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Spot my mistake: Treating a non-ohmic conductor as though it obeyed Ohm's law
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Real-life Nigeria: Reading a Nigerian electricity meter
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Worked example: Finding the spring constant from a graph
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Spot my mistake: Reading the spring constant from the wrong part of the graph
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Real-life Nigeria: Springs in Nigerian vehicles and weighing scales
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Worked example: Explaining the leaf movement in an electroscope experiment
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Spot my mistake: Thinking a lightning conductor attracts lightning to a house
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Real-life Nigeria: Static electricity hazards at Nigerian fuel stations
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Worked example: Explaining a described capillarity observation
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Spot my mistake: Confusing surface tension with viscosity
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Real-life Nigeria: Surface tension and viscosity in Nigerian daily life
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