1,334 prompts matching "Counting the arrangements of people in a queue"
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Common Mistakes: The condition for a line to be a tangent to a circle
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Quiz: The equation of the tangent to a parabola
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Spot My Mistake: The foci of an ellipse
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Show All Working: The rectangular hyperbola xy equals c squared
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Final Revision: The focus-directrix definition shared by all the conics
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Learn: The range, and why it is a weak measure of spread
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Spot My Mistake: The standard deviation of an ungrouped set of data
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Final Revision: A ladder leaning against a wall, and the moments acting on it
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Learn: The velocity of one body relative to another
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Show All Working: The time at which two bodies are nearest one another
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Common Mistakes: The relative displacement of two bodies after a given time
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Final Revision: Interception, where one body must catch another
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Worked Example: The common acceleration of two connected particles
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Show All Working: A lift, and the person standing in it
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Final Revision: The distance connected particles travel before one reaches the floor
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Show All Working: The angle at which a body just begins to slide
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Common Mistakes: The work done against friction on an incline
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Show All Working: A body in a vertical circle, and the tension at the top
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Worked Example: The amplitude, period and frequency of a simple harmonic motion
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WAEC Prep: The simple pendulum as an example of simple harmonic motion
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