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  1. Cuemath
    https://www.cuemath.com/measurement/metric-system
    Metric System - Chart, Units, Conversion, Examples - Cuemath
    How metric system chart is arranged?
    For proper conversion of units, the metric system chart is arranged from highest to lowest unit. In this chart, all the units are based on one base unit and each unit is 10 times of its preceding unit. The base table of the metric system chart is given below:
    geeksforgeeks.org
    List of metric units - Wikipedia

    There are several metric systems, most of which have become disused or are still used in only niche disciplines. Systems are listed with named units that are associated with them.
    The centimetre–gram–second system of units (CGS) is based on three base units: centimetre, gram and second. Its subsystems (CGS-ESU, CGS-EMU and CGS-Gaussian) have different defining equations for their sys…

    There are several metric systems, most of which have become disused or are still used in only niche disciplines. Systems are listed with named units that are associated with them.
    The centimetre–gram–second system of units (CGS) is based on three base units: centimetre, gram and second. Its subsystems (CGS-ESU, CGS-EMU and CGS-Gaussian) have different defining equations for their systems of quantities for defining electromagnetic quantities and hence the associated units, with CGS-Gaussian units being selected from each of the other two subsystems.

    The CGS-to-SI correspondence of electromagnetic units as given was exact prior to the 2019 revision of the SI, until which the magnetic constant μ0 was defined as 4π×10 N⋅A . As from the redefinition, μ0 has an inexactly known value when expressed in SI units, with the exactness of the electromagnetic unit correspondence given here being affected accordingly.
    • The kayser (K) is a unit of wavenumber equal to 1 cm (100 m ).
    • The gal (Gal) is a unit of acceleration equal to 1 cm/s .
    • The dyne (dyn) is a unit of force equal to 1 g⋅cm⋅s (10 μN).
    • The barye (Ba) is a unit of pressure equal to 1 dyn⋅cm (100 mPa).

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    Wikipedia

    Metric units are units based on the metre, gram or second and decimal (power of ten) multiples or sub-multiples of these. According to Schadow and McDonald, metric units, in general, are those units "defined 'in the spirit' of the metric system, that emerged in late 18th century France and was rapidly adopted by scientists and engineers. Metric units are in general based on reproducible natural phenomena and are usually not part of a system of comparable units with different magnitudes, especially not if the ratios of these units are not powers of 10. Instead, metric units use multiplier prefixes that magnifies or diminishes the value of the unit by powers of ten." The most widely used examples are the units of the International System of Units (SI). By extension they include units of electromagnetism from the CGS and SI units systems, and other units for which use of SI prefixes has become the norm. Other unit systems using metric units include:
    • International System of Electrical and Magnetic Units
    • Metre–tonne–second (MTS) system of units
    • MKS system of units (metre, kilogram, second)

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    The first group of metric units are those that are at present defined as units within the International System of Units (SI). In its most restrictive interpretation, this is what may be meant when the term metric unit is used.

    The unit one (1) is the unit of a quantity of dimension one. It is the neutral element of any system of units.

    Furthermore, there are twenty-four metric prefixes that can be combined with any of these units except one (1) and kilogram (kg) to form further units of the SI. For mass, the same prefixes are applied to the gram (g) instead of the kilogram.

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