500 prompts matching "Why Nigerian mains is quoted as 220 volts"
Worked example: Calculating the heat needed to boil a mass of water
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Quiz: The expansion of solids, liquids and gases compared
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Worked example: Calculating the increase in length of a heated rod
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Spot my mistake: Forgetting to convert units before an expansivity calculation
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Spot my mistake: Claiming that radiation needs a medium
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Spot my mistake: Confusing the centre of gravity with the centre of a shape
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Quiz: Measuring the density of a solid and of a liquid
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Practice set: The hydraulic press, and the principle Pascal gave it
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Worked example: Calculating the size of a shadow cast by a point source
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Spot my mistake: Confusing the umbra with the penumbra
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Spot my mistake: Drawing the reflected ray on the wrong side of the normal
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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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Spot my mistake: Mixing up the sign convention for a diverging lens
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Practice set: The elastic limit and the yield point
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Spot my mistake: Reading the spring constant from the wrong part of the graph
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Exam timing: A timed set of elasticity calculations
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Spot my mistake: Leaving out the weight of the beam itself
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Spot my mistake: Thinking a lightning conductor attracts lightning to a house
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Worked example: Applying Boyle's law to a described gas problem
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