1,330 prompts matching "Learn: Telling a rational number from an irrational one"
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Spot My Mistake: Why friction does not depend on the area of contact
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Spot My Mistake: The moment of a force whose line of action is not perpendicular
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Worked Example: The moment of a force about a point on its own line of action
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Practice: Resolving three forces in two perpendicular directions
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Spot My Mistake: The probability of exactly r successes in n trials
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Practice: The probability of exactly r events in a Poisson distribution
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Worked Example: The probability of no events at all in a Poisson distribution
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Practice: Using the normal tables when the z-score is negative
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Spot My Mistake: When the normal distribution may approximate the binomial
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Worked Example: The continuity correction when approximating a discrete distribution
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Spot My Mistake: Drawing a vector as a directed line segment
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Practice: The magnitude of the sum of two vectors
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Worked Example: Finding the unit vector in the direction of a given vector
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Practice: A vector of stated magnitude in a given direction
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Worked Example: The position vector of the midpoint of AB
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Worked Example: Testing two vectors for perpendicularity
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Practice: Deciding whether a point lies on a given line
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Spot My Mistake: The equilibrium condition written in vector form
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Practice: Why complex roots of a real quadratic come in conjugate pairs
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Worked Example: The quotient rule for differentiation
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