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18 June, 17:11

Which of the following is a vector quantity?

A. 100 ounces of water

B. 30 m down

C. 88 mi/s

D. 45 gallons in a bucket

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Answers (1)
  1. 18 June, 18:44
    0
    B. 30 m down

    Explanation:

    In physics we have two types of quantities:

    - Scalar quantity: it is a quantity which only has a magnitude (e. g: mass and time are scalar quantities, since they only have a magnitude)

    - Vector quantity: it is a quantity which has both a magnitude and a direction (e. g: velocity is a vector quantity, since it has a magnitude (the speed) and a direction)

    In this problem, we have:

    A. 100 ounces of water - -> scalar (this is a volume, which has only a magnitude)

    B. 30 m down - -> vector (this is a displacement, which has both a magnitude (30 m) and a direction (down)

    C. 88 mi/s - -> scalar (this is a speed, which has only a magnitude)

    D. 45 gallons in a bucket - -> scalar (this is a volume, which has only a magnitude)

    So, the correct option is B.
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