Affiliation:
1. University of Miskolc and BAY-LOGI Research Institute, Miskolc, Hungary
Abstract
It is shown here that five base quantities (and the corresponding five base
units) of nature are sufficient to define all derived quantities (and their
units) and to describe all natural phenomena. The base quantities (and their
base units) are: length (m), mass (kg), time (s), temperature (K) and
electric charge (C). The amount of substance (mole) is not taken as a base
quantity of nature and the Avogadro constant is not considered as a
fundamental constant of nature, as they are both based on an arbitrary
definition (due to the arbitrary value of 0.012 kg for the mass of 1 mole of
C-12 isotope). Therefore, the amount of substance (mole) is moved from the
list of base quantities to the category of the supplementary units (to be
re-created after its abrogation in 1995). Based on its definition, the
luminous intensity (cd) is not a base quantity (unit), therefore it is moved
to the list of derived quantities (units). The ampere and coulomb are
exchanged by places in the list of base and derived units, as ampere is a
speed of coulombs (but SI defines meter, not its speed as a base unit). The
five base quantities are re-defined in this paper by connecting them to five
fundamental constants of nature (the most accurately known frequency of the
hydrogen atom, the speed of light, the Planck constant, the Boltzmann
constant and the elementary charge) with their numerical values fixed in
accordance with their CODATA 2006 values (to be improved by further
experiments).
Publisher
National Library of Serbia
Subject
Materials Chemistry,Metals and Alloys,Mechanics of Materials,Geotechnical Engineering and Engineering Geology
Cited by
1 articles.
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1. On the atomic masses (weights?) Of the elements;Journal of Mining and Metallurgy, Section B: Metallurgy;2012