Measurement in Physics | Unit and Numerical Value of a physical quantity

Measurement in Physics: 

To measure any physical amount, we take the definite result of that amount as the standard and give any name to this human, this is called the unit of that amount only to compare a given amount with its unit. Measurement says that to express the mother of a zodiac, it is necessary to mention the following two things only in which that physical amount is measured and the face value which displays the result of that amount, that is, it tells how much of its quantity is its unit.

1) Unit

2) Numerical Value

When we say that the length of a rod is 20 meters, it means that the length of the rod is a unit of measure and it is included 20 times the length of the rod, if we take a unit of length or a kilometer of the length of this rod. The length will be 2000 cm or 20000 mini. It is clear that the smaller the amount of a zodiac, the smaller its face value increases. The qualitative result of the corresponding unit is always a constant.