Which of the following is a vector?

Options

A. Pressure
B. Displacement
C. Moment of inertia
D. none of these

Explanation

To determine which of the following is a vector, we need to understand the definitions of vectors, scalars, and tensors.

### Step-by-step Solution:

1. **Understand the Definitions**:
- **Vector**: A quantity that has both magnitude and direction. Examples include displacement, velocity, and force.
- **Scalar**: A quantity that has only magnitude and no direction. Examples include mass, temperature, and pressure.
- **Tensor**: A more complex quantity that has magnitude, direction, and a plane. An example is moment of inertia.

2. **Identify the Options**:
- Without specific options given in the question, we can assume common examples. Let's consider:
- A) Pressure
- B) Displacement
- C) Moment of Inertia
- D) Temperature

3. **Classify Each Option**:
- **Pressure**: This is a scalar quantity as it only has magnitude (e.g., 101.3 kPa) and no direction.
- **Displacement**: This is a vector quantity as it has both magnitude (e.g., 5 meters) and direction (e.g., north).
- **Moment of Inertia**: This is a tensor quantity as it has magnitude, direction, and a plane.
- **Temperature**: This is also a scalar quantity as it only has magnitude (e.g., 25 degrees Celsius) and no direction.

4. **Conclusion**:
- Among the options, **Displacement** is the only vector quantity.

### Final Answer:
The vector quantity among the options is **Displacement**.

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