429 prompts matching "What radioactivity is, and why some nuclei are unstable"
Real-life Nigeria: Elasticity in Nigerian construction and everyday objects
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Practice set: Couples and the turning effect a couple produces
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Real-life Nigeria: Turning forces in Nigerian tools and machines
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Quiz: Finding the centre of mass of a regular and of an irregular body
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Spot my mistake: Forgetting that momentum has a direction
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Real-life Nigeria: Momentum in Nigerian road collisions
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Practice set: Archimedes' principle and upthrust
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Spot my mistake: Confusing density with weight
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Worked example: Calculating wave speed from frequency and wavelength
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Practice set: The progressive wave and the stationary wave
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Spot my mistake: Confusing wavelength with amplitude
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Real-life Nigeria: Waves in Nigerian water and in sound
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Quiz: Mechanical waves and electromagnetic waves
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Exam prep: Interference of waves and the conditions for it
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Spot my mistake: Assuming every wave needs a medium to travel through
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Quiz: Regular reflection and diffuse reflection
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Real-life Nigeria: Mirrors in Nigerian vehicles and buildings
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Exam prep: Total internal reflection and the critical angle explained
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Spot my mistake: Measuring angles from the surface instead of from the normal
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Worked example: Using the lens formula to find the image distance
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