Which of the following is a vector quantity?

• A. $\mathrm{Temperature}$
• B. $\mathrm{Mass}$
• C. $\mathrm{Velocity}$
• D. $\mathrm{Speed}$

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the difference between scalar and vector quantities. Scalars have only magnitude, while vectors have both magnitude and direction.
2. Step 2: Analyze each option: Temperature is a scalar because it only has magnitude (how hot or cold something is).
3. Step 3: Mass is also a scalar quantity since it only has magnitude (how much matter an object contains).
4. Step 4: Speed is a scalar because it describes how fast an object is moving without specifying direction.
5. Step 5: Velocity is a vector quantity because it includes both the speed of the object and the direction of its motion.