1,251 prompts matching "how many ways can a president and secretary be chosen from 8 people"
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Spot My Mistake: The standard deviation of an ungrouped set of data
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WAEC Prep: The standard deviation of grouped data using an assumed mean
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Learn: The moment of a force about a point, and its units
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Worked Example: The sign convention for clockwise and anticlockwise moments
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Spot My Mistake: The point at which a loaded beam will tip about its support
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WAEC Prep: A couple, and why its moment is the same about every point
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Show All Working: Replacing two parallel forces by a single resultant
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Final Revision: A ladder leaning against a wall, and the moments acting on it
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Spot My Mistake: An aeroplane in a cross-wind, and its resultant track
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Show All Working: The time at which two bodies are nearest one another
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WAEC Prep: A car towing a trailer, and the force in the tow bar
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Final Revision: The distance connected particles travel before one reaches the floor
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Learn: Resolving the weight along and perpendicular to an inclined plane
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Quiz: The centripetal force, and what supplies it in a given situation
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Final Revision: The period and the frequency of circular motion
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Worked Example: The amplitude, period and frequency of a simple harmonic motion
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Practice: The maximum speed and the maximum acceleration in simple harmonic motion
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Spot My Mistake: The time taken to move between two points in simple harmonic motion
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Show All Working: A mass on a spring performing simple harmonic motion
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Learn: Hooke's law, and what the modulus of elasticity means
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