Which of the following quantities can be described by their magnitude and direction?

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BlackTom AI · Accepted Answer

The question asks which quantities can be described by their magnitude and direction, which points to vector quantities. 
Option b: acceleration. This is indeed a vector quantity, since it has both magnitude (how much the velocity is changing per unit time) and direction (the direction in which the velocity is changing). Therefore, describing acceleration by its magnitude and direction is correct. 
Because the provided answer_options list is empty, there are no other specific choices to evaluate here. In general, other vector quantities include velocity (magnitude and direction of motion) and displacement (magnitude and direction of the overall change in position). 
If any additional options had been given, we would assess whether each one is a vector (needs both magnitude and direction) or a scalar (described by magnitude only). Since the only explicitly stated correct item is acceleration, we can reaffirm that it is correctly described by both magnitude and direction. 
In summary, acceleration fits the criterion of being described by magnitude and direction because it conveys how quickly and in what direction velocity is changing.

Which of the following quantities can be described by their magnitude and direction?

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