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fundamental units

См. также в других словарях:

  • Fundamental unit — A set of fundamental units is a set of units for physical quantities from which every other unit can be generated. In the language of measurement, quantities are quantifiable aspects of the world, such as time, distance, velocity, mass, momentum …   Wikipedia

  • Units of measurement — Weights and measures redirects here. For other uses, see Weights and measures (disambiguation). The former Weights and Measures office in Seven Sisters, London A unit of measurement is a definite magnitude of a physical quantity, defined and… …   Wikipedia

  • Fundamental interaction — In physics, a fundamental interaction or fundamental force is a mechanism by which particles interact with each other, and which cannot be explained in terms of another interaction. Overview In the conceptual model of fundamental interactions,… …   Wikipedia

  • Units of energy — Because energy is defined via work, the SI unit for energy is the same as the unit of work ndash; the joule (J), named in honour of James Prescott Joule and his experiments on the mechanical equivalent of heat. In slightly more fundamental terms …   Wikipedia

  • absolute units — Units derived directly from the fundamental units of a system and not based on arbitrary numerical definitions. The differences between absolute and international units were small; both are now superseded by the definitions of SI units …   Dictionary of automotive terms

  • Fundamental physical constant (disambiguation) — * In physics, fundamental or dimensionless physical constants are, in the strictest sense, physical constants that are independent of systems of units and hence are dimensionless numbers.* In a broader sense, the phrase fundamental physical… …   Wikipedia

  • fundamental unit — noun each of a set of unrelated units of measurement from which other units are derived, for example (in the SI system) the metre, kilogram, and second …   English new terms dictionary

  • fundamental unit — /ˌfʌndəmɛntl ˈjunət/ (say .funduhmentl yoohnuht) noun one of the units (especially those of mass, length, and time) taken as a basis for a system of units …  

  • Planck units — are units of measurement named after the German physicist Max Planck, who first proposed them in 1899. They are an example of natural units, i.e. units of measurement designed so that certain fundamental physical constants are normalized to 1. In …   Wikipedia

  • Natural units — In physics, natural units are physical units of measurement based only on universal physical constants. For example the elementary charge e is a natural unit of electric charge, or the speed of light c is a natural unit of speed. A purely natural …   Wikipedia

  • Atomic units — (au) form a system of units convenient for atomic physics, electromagnetism, and quantum electrodynamics, especially when the focus is on the properties of electrons. There are two different kinds of atomic units, which one might name Hartree… …   Wikipedia

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