500 prompts matching "The photoelectric effect and what is observed"
Exam prep: Conduction, convection and radiation compared
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Spot my mistake: Claiming that radiation needs a medium
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Quiz: Locating the centre of gravity of a regular body
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Let me explain: Finding the centre of gravity of an irregular lamina
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Practice set: Stable, unstable and neutral equilibrium
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Exam prep: The conditions that make a body stable
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Real-life Nigeria: Stability in Nigerian lorries and market stalls
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Real-life Nigeria: Hydraulic brakes and jacks in Nigerian vehicles
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Exam timing: A timed set of pressure and density problems
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Quiz: Luminous and non-luminous bodies
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Real-life Nigeria: Shadows and sunlight in Nigerian building design
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Quiz: The laws of reflection stated
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Practice set: Curved mirrors, concave and convex
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Real-life Nigeria: Concave and convex mirrors in Nigerian use
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Quiz: The laws of refraction stated
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Practice set: Real depth and apparent depth compared
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Practice set: Linear magnification and its calculation
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Exam prep: The image formed at each object position for a converging lens
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Spot my mistake: Treating a non-ohmic conductor as though it obeyed Ohm's law
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Exam prep: The work done in stretching a spring
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