Scalars vs. Vectors in Physics

Steps:

• Recall that physical quantities are classified as scalars or vectors based on direction.
• Identify scalars as having only magnitude, like mass or temperature.
• Eliminate options mentioning components, units, or missing magnitude, as they misrepresent scalars.
• Confirm the definition: scalars lack direction, unlike vectors.

Why C is correct:

• By definition, a scalar quantity has magnitude but no direction, as per standard physics classification (e.g., speed is scalar, velocity is vector).

Why the others are wrong:

• A describes vector resolution into components, not scalars.
• B is incorrect; scalars like distance require units (e.g., meters).
• D is wrong; scalars must have magnitude, distinguishing them from zero or undefined quantities.

Final answer: C