787 prompts matching "Explaining why we rationalise denominators"
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Worked Example: The interquartile range of a set of ordered data
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Quiz: The semi-interquartile range
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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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Show All Working: The effect on the standard deviation of adding a constant to every value
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Final Revision: Reading the quartiles off a cumulative frequency curve
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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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Quiz: The principle of moments for a body in equilibrium
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Spot My Mistake: The point at which a loaded beam will tip about its support
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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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Learn: The velocity of one body relative to another
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Worked Example: Relative velocity when two bodies move along the same line
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Quiz: Relative velocity when the two motions are at right angles
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Spot My Mistake: An aeroplane in a cross-wind, and its resultant track
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WAEC Prep: The closest approach of two moving ships
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Show All Working: The time at which two bodies are nearest one another
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Final Revision: Interception, where one body must catch another
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Learn: Two particles joined by a light inextensible string over a smooth pulley
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