Ciro Santilli
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中国独裁统治 China Dictatorship 新疆改造中心、六四事件、法轮功、郝海东、709大抓捕、2015巴拿马文件 邓家贵、低端人口、西藏骚乱
List of systems of units
System of units
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Table of contents
479
International System of Units (SI)
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List of systems of units
37
Origins of Precision by Machine Thinking (2017)
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International System of Units
17
Versions of the international System of Units
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International System of Units
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2019 redefinition of the SI base units
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Versions of the international System of Units
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Ampere in the 2019 redefinition of the SI base units
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International System of Units
67
Ampere
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International System of Units
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Kilogram
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International System of Units
19
Kibble balance
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Kilogram
5
Time
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International System of Units
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Frequency
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Time
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Period (physics)
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Frequency
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Hertz (1857-1894, Hz)
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Frequency
4
Megahertz (MHz)
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Hertz
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Clock
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Time
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Quartz clock
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Clock
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Atomic clock
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Clock
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Caesium standard (1967, 3.26 cm)
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Atomic clock
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Unit of time
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Time
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Decimal time
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Unit of time
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Second (s)
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Unit of time
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Day (d)
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Unit of time
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Calendar
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Day
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Year (y)
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Unit of time
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Length
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International System of Units
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Meter
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Length
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Micrometer (Micron)
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Meter
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Nanometer
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Meter
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Angstrom (Ä)
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Meter
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Picometer (pm)
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Meter
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Gauge block
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Length
4
Light year (ly)
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Length
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Geiger counter
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International System of Units
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Natural units
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International System of Units
15
Planck units
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Natural units
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Ancestors
System of units
Physics
Natural science
Science
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