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Q: Which of the following is a scalar quantity?
  • A. Pressure
  • B. Displacement
  • C. Force
  • D. Momentum
Correct Answer: Option A - Pressure is a scalar quantity, because it has magnitude but does not have direction, whereas force, displacement and momentum all are vector quantities because they have both direction and magnitude.
A. Pressure is a scalar quantity, because it has magnitude but does not have direction, whereas force, displacement and momentum all are vector quantities because they have both direction and magnitude.

Explanations:

Pressure is a scalar quantity, because it has magnitude but does not have direction, whereas force, displacement and momentum all are vector quantities because they have both direction and magnitude.