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A table of physical constants expressed in SI units, with values, uncertainties and references. Includes constants related to speed of light, Planck constant, Boltzmann constant, Newtonian constant, cosmological constant, elementary charge, fine-structure constant and more.
Find the latest values of the fundamental physical constants from the National Institute of Standards and Technology (NIST), based on the recommendations of the Committee on Data for Science and Technology (CODATA). Search by name, category, or correlation coefficient, and access previous values and links to scientific data.
A physical constant is a quantity that cannot be explained by a theory and must be measured experimentally. Learn about the characteristics, examples, numerical values, and units of physical constants, and how they relate to the International System of Units and natural units.
Fundamental Physical Constants — Extensive Listing. Relative std. Quantity Symbol Value Unit uncert. u. r. UNIVERSAL speed of light in vacuum c;c. 0299792458 m s1(exact) magnetic constant . 04π 107N A2. = 12:566370614::: 107N A2(exact) electric constant 1/ . 0c2 .
12 Οκτ 2018 · Learn about the seven constants that define the base SI units in the revised SI system. See how they relate to physics, quantum mechanics, electromagnetism and more.
Learn about the fundamental invariant quantities observed in nature and appearing in the basic theoretical equations of physics, such as speed of light, charge on electron, Planck's constant, etc. See the table of values and units of selected physical constants and their applications in physics and chemistry.
10 Ιουν 2009 · NIST provides values, citations, and guidelines for the basic constants and conversion factors of physics and chemistry. Search the database or browse the SI, the modern metric system of measurement.
