 International System of Units

The International System of Units (SI) is the standard system of measurement used globally in science, industry, and commerce. It provides a consistent framework for measurement based on a set of base units and derived units, which are used to express physical quantities. ### Base Units The SI is built upon seven base units, each defined by a specific physical phenomenon: 1. **Meter (m)** - The unit of length. 2. **Kilogram (kg)** - The unit of mass.

The key is to define only the minimum number of measures: if you define more definitions become over constrained and could be inconsistent.

Learning the modern SI is also a great way to learn some interesting Physics.