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040 |aCaOODSP|beng|erda|cCaOODSP
043 |an-cn---
0861 |aNR16-429/2023E-PDF
24504|aThe international system of units : |ba shift to fundamental constants.
264 1|a[Ottawa] : |bNational Research Council Canada = Conseil national de recherches Canada, |c[2023].
264 4|c©2023
300 |a1 online resource (8 unnumbered pages) : |billustrations, photographs
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
500 |aCover title.
500 |aIssued also in French under title: Le système international d'unités : vers des constantes fondamentales.
520 |a"The International System of Units (SI) is the most widely used system of units with official status in almost every country in the world. It contains seven base units, which are all dependent simply, repeatably and accurately on physical constants, which are always the same and can be measured anywhere. The Planck constant is a fundamental constant of nature that scales the relationship between the energy and frequency of light. The National Research Council of Canada (NRC) is one of a few national metrology institutes providing leadership in experiments that are essential to determining the unit kilogram from Planck constant"--Innovation in Canada’s measurement standards, page [3].
650 0|aMetric system|zCanada.
7102 |aNational Research Council Canada, |eissuing body.
77508|tLe système international d'unités : |w(CaOODSP)9.930460
7760#|tThe international system of units : |w(CaOODSP)9.930459
85640|qPDF|s1.23 MB|uhttps://publications.gc.ca/collections/collection_2024/cnrc-nrc/NR16-429-2023-eng.pdf