International System of Units | Measurement, Conversion & History
https://www.britannica.com/science/International-System-of-Units
WebApr 13, 2024 · International System of Units (SI), international decimal system of weights and measures derived from and extending the metric system of units. SI has seven basic units, from which others are derived: the second, the meter, the kilogram, the ampere, the kelvin, the mole, and the candela.
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