The International System of Units is the modern form of the metric system.... (SI) defines seven SI base units: physical units defined by an operational definitionOperational definition
An operational definition is a description of something—such as a variable, term, or object—in terms of the spe... .
All other physical units can be derived from these base units: these are known as SI derived unitSI derived unit
SI derived units are part of the SI system of measurement units and are derived from the seven SI base units.... s. Derivation is by dimensional analysisDimensional analysis
Dimensional analysis is a conceptual tool often applied in physics, chemistry, and engineering to understand physical situat... . SI prefixSI prefix
An SI prefix is a name or associated symbol that precedes a unit of measure to form a decimal multiple or submultiple.... es are used to abbreviate long numbers.
The following are the base units from which all others are derived; they are dimensionally independent.
