219 prompts matching "Solving a balanced beam problem"
Worked example: Image position and magnification for a stated object distance
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Spot my mistake: A ray diagram drawn with rays that do not obey the rules
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Real-life Nigeria: Spectacles, cameras and projectors in daily use
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Worked example: The speed of sound from a resonance tube experiment
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Spot my mistake: An echo calculation that forgets the return journey
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Real-life Nigeria: Acoustics in a Nigerian church or mosque hall
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Worked example: Energy stored in a charged capacitor
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Spot my mistake: Combining capacitors with the resistor rules
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Real-life Nigeria: Capacitors in fans, inverters and camera flashes
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Worked example: Resistance of a wire from its dimensions and resistivity
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Spot my mistake: A resistivity calculation using diameter instead of radius
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Real-life Nigeria: Cable sizing in Nigerian house wiring
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Worked example: The cost of running an appliance for a stated period
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Spot my mistake: An energy bill calculation left in watt-seconds
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Real-life Nigeria: Estimating a Nigerian household's monthly bill
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Worked example: The mass deposited from a stated current and time
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Spot my mistake: A Faraday calculation with the wrong valency
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Real-life Nigeria: Electroplating in Nigerian metal workshops
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Worked example: Turns ratio and output voltage of a transformer
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Spot my mistake: A transformer calculation with the ratio inverted
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