Alusühik

Alusühik is a term used in Estonian to refer to a base unit of measurement. These are fundamental and indivisible units within a system of measurement, from which all other units in that system can be derived. The most common system of base units is the International System of Units (SI).

In the SI system, there are seven base units: the meter (m) for length, the kilogram (kg) for mass, the second (s) for time, the ampere (A) for electric current, the kelvin (K) for thermodynamic temperature, the mole (mol) for amount of substance, and the candela (cd) for luminous intensity. These alusühikud are the foundation upon which all other SI units, known as derived units, are built. For example, the unit of force, the newton (N), is derived from base units of mass, length, and time (kg⋅m⋅s⁻²).

The concept of alusühikud provides a standardized and internationally recognized framework for scientific and technical communication. It ensures that measurements are consistent and comparable across different regions and disciplines. While the SI system is the most prevalent, other historical or specialized measurement systems may have their own sets of base units. Understanding alusühikud is crucial for comprehending any system of measurement.