H13-311_V3.5 · Question #268
Vector is a number.
The correct answer is B. False. B is correct because a vector is not simply a number - it is a mathematical object defined by both magnitude (size) and direction. A plain number, called a scalar, has magnitude only (e.g., temperature, mass, speed). Why A is wrong: Calling a vector "just a number" strips away…
Question
Vector is a number.
Options
- ATrue
- BFalse
How the community answered
(54 responses)- A22% (12)
- B78% (42)
Explanation
B is correct because a vector is not simply a number - it is a mathematical object defined by both magnitude (size) and direction. A plain number, called a scalar, has magnitude only (e.g., temperature, mass, speed).
Why A is wrong: Calling a vector "just a number" strips away its directional component entirely. For example, "5 m/s northeast" is a vector; "5 m/s" alone is a scalar. Removing direction makes it a different type of quantity.
Memory tip: Think of the word vector like a direction arrow - arrows have both a length (magnitude) and a way they point (direction). Scalars are just the length; vectors are the full arrow.
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