NIST Special PublicationThe Institute, 2001 |
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Загальні терміни та фрази
104 and Metrologia 11th CGPM 11th Conférence Générale 1st CGPM 9th CGPM absorbed dose adopted amount of substance ampere base units BIPM candela Celsius cesium CIPM coherent Comité International considering decimal multiples decisions defined degree Celsius derived units dose equivalent Editor's note frequency standards Générale des Poids International Atomic International des Poids international prototype International System joule per kilogram katal kelvin kilogram laboratories laser luminous intensity Mesures CGPM Meter Convention metric multiples and submultiples names and symbols newton NIST non-SI units physical Poids et Mesures practical system prefix symbols relative standard uncertainty Resolution 12 Resolution 6 CR SI base units SI derived units SI prefixes SI units sievert special names specified square meter steradian supplementary units system of units Système International d'Unités Table thermodynamic temperature transition unit Expressed unit name unit of luminous unit of mass unit of thermodynamic unit symbols vacuum watt wavelength
Популярні уривки
Сторінка 8 - The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 meter apart in vacuum, would produce between these conductors a force equal to 2 x 10"7 newton per meter of length (9th CGPM, 1948).
Сторінка 9 - The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12.
Сторінка 38 - The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 x 1012 hertz and that has a radiant intensity in that direction of (1/683) watt per steradian.
Сторінка 7 - The second is the duration of 9, 192, 631, 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium- 133 atom (13th CGPM, 1967).
Сторінка 10 - Units length meter* (m) mass* kilogram (kg) time second (s) electric current ampere (A) thermodynamic temperature* kelvin (K) amount of substance mole (mol) luminous intensity candela (cd) Supplementary Units plane angle radian (rad) solid angle steradian (sr) The spellings "metre" and "litre" are preferred by ASTM; however, "-er
Сторінка 6 - The metre is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second.