Which of the following is not the name of the physical quantity?
Time
impulse
mass
kilogram

Options

A. Time
B. impulse
C. mass
D. kilogram

Explanation

To determine which of the following is not the name of a physical quantity, we will analyze each option provided:

1. **Time**:
- Time is a fundamental physical quantity that can be measured. It is commonly measured in seconds (s). Therefore, time is indeed a physical quantity.

2. **Impulse**:
- Impulse is defined as the change in momentum of an object when a force is applied over a period of time. It can be calculated as the product of force and the time duration over which it acts (Impulse = Force × Time). Since impulse can be measured and has a physical representation, it is also a physical quantity.

3. **Mass**:
- Mass is a measure of the amount of matter in an object. It is a fundamental physical quantity and is measured in kilograms (kg). Thus, mass is a physical quantity.

4. **Kilogram**:
- Kilogram is the SI unit of mass. While it is used to measure mass, it itself is not a physical quantity; rather, it is a unit of measurement. Therefore, kilogram does not represent a physical quantity.

Based on the analysis above, the answer to the question is:

**The option that is not the name of a physical quantity is: Kilogram.**