Metric system
Decimal-based systems of measurement
Metric system
A system of measurement is a frame in which physical qualities (such as length, weight, temperature, etc.) can be quantified with numbers. Among many systems of measurement, the metric system refers to ones that standardise a set of base units and a nomenclature describing relatively large and small quantities using decimal-based multiplicative unit prefixes (such as kilo and milli). The International System of Units (SI) is a good example, and there are other widely accepted systems (less popular than SI) mainly used in specific fields, such as the Gaussian units for electromagnetism. Though rules governing the metric system have changed over time, the modern definition in the International System of Units prescribes the metric prefixes and seven base units: metre (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol), and candela (cd). An SI derived unit is a named combination of base units, such as the hertz (cycles per second), newton (kg⋅m/s2), and tesla (1 kg⋅s−2⋅A−1)...
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