TECHNICAL DATA INTERNATIONAL SYSTEM OF UNITS SI …

1 12531254 INTERNATIONAL SYSTEM OF UNITS SI Excerpts from JIS Z 8203 1985 TECHNICAL DATA Table 1. Base UnitsNote 1 The elementary particles here must be atoms, molecules, ions, electrons or other 2. Supplementary UNITS 5 Derived UNITS UNITS expressed algebraically with mathematical symbols such as multiplication and division signs using base UNITS and supplementary UNITS are considered to be derived UNITS . Derived UNITS with special names and symbols are shown in Table The INTERNATIONAL SYSTEM of UNITS SI and its usage1 1. Scope of application This standard specifies the INTERNATIONAL SYSTEM of UNITS SI and how to use UNITS under the SI SYSTEM , as well as the UNITS which are or may be used in conjunction with SI SYSTEM 2.

2 Terms and definitions The terminology used in this standard and the definitions thereof are as follows. 1 INTERNATIONAL SYSTEM of UNITS SI A consistent SYSTEM of UNITS adopted and recommended by the INTERNATIONAL Committee on Weights and Measures. It contains base UNITS and supplementary UNITS , UNITS derived from them, and their integer exponents to the 10th power. SI is the abbreviation of SYSTEM INTERNATIONAL d'Unites INTERNATIONAL SYSTEM of UNITS . 2 SI UNITS A general term used to describe base UNITS , supplementary UNITS , and derived UNITS under the INTERNATIONAL SYSTEM of UNITS SI . 3 Base UNITS The UNITS shown in Table 1 are considered the base UNITS .

3 4 Supplementary UNITS The UNITS shown in Table 2 below are considered the supplementary : Examples of SI Derived UNITS Expressed in Terms of Base UnitsTable 3. SI Derived UNITS with Special Names and Symbols 1 3. Integer exponents of SI UNITS 1 Prefixes The multiples, prefix names, and prefix symbols that compose the integer exponents of 10 for SI UNITS are shown in Table 4. Prefixes2. Conversion table for conventional UNITS that are difficult to convert to SI UNITS The UNITS enclosed by bold lines are the SI UNITS . Note: 1P 1dyn s/cm2 1g/cm s 1Pa s 1N s/m2, 1cP 1mPa sNote: 1St 1cm2/s, 1cSt 1mm2/sNote: 1Pa 1N/m2, 1 MPa 1N/mm2 Note: 1Pa 1N/m2 Note: 1J 1W s, 1J 1N mNote: 1W 1J/s, PS: French horsepowerMeasureUnit nameUnit symbolDefinitionLengthMetermA meter is the length of the path traveled by light in a vacuum during a time interval of 1 299 792 458 of a kilogram is a unit of mass not weight or force.

4 It is equal to the mass of the INTERNATIONAL prototype of 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 flowAmpereAAn 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 a vacuum, would produce between these conductors a force equal to 2 10 7 Newtons per meter of temperatureKelvinKA Kelvin is the fraction 1 of the thermodynamic temperature of the triple point of of substanceMolemolA mole is the amount of substance of a SYSTEM that contains as many elementary particles 1 or aggregations of elementary particles as there are atoms in kilogram of carbon 12.

5 When the mole is used, the elementary particles must be intensityCandelacdA candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 1012 hertz and that has a radiant intensity in that direction of 1 683 watts per nameUnit symbolDefinitionPlane angleRadianradA radian is the plane angle between two radii of a circle that cuts off an arc on the circumference equal in length to the angleSteradiansrA steradian is the solid angle which, having its vertex in the center of a sphere, cuts off an area of the surface of the sphere equal to that of a square with sides equal in length to the radius of the unitNameSymbolSurface areaSquare meterm2 VolumeCubic meterm3 SpeedMeters per secondm/sAccelerationMeter per second per secondm/s2 Wave numbersPer meterm 1 DensityKilograms per cubic meterkg/m3 Current densityAmperes per square meterA/m2 Magnetic field strengthAmperes per meterA/mConcentration of substanceMoles per cubic metermol/m3 Specific volumeCubic meters per kilogramm3/kgLuminanceCandelas per square metercd/m2 MeasureDerived unitDerivation from basic unit or supplementary unit .

6 Or derivation from another derived unitNameSymbolFrequencyHertzHz1 Hz 1 s 1 ForceNewtonN1 N 1 kg m/s2 Pressure, stressPascalPa1 Pa 1 N/m2 Energy, work, heat quantityJouleJ1 J 1 N mWork rate, process rate, power, electric powerWattW1 W 1 J/sElectric charge, quantity of electricityCoulombC1 C 1 A sElectric potential, potential difference, voltage, electromotive forceVoltV1 V 1 J/CElectrostatic capacity, capacitanceFaradF1 F 1 C/VElectric resistanceOhm 1 1 V/AConductanceSiemensS1 S 1 1 Magnetic fluxWeberWb1 Wb 1 V sMagnetic flux density magnetic induction TeslaT1 T 1 Wb/m2 InductanceHenryH1 H 1 Wb/ACelsius temperatureDegrees Celsius or degrees C1 t C t KLuminous fluxLumenlm1 lm 1 cd srIlluminationLuxlx1 lx 1 lm/m2 RadioactivityBecquerelBq1 Bq 1 s 1 Absorbed doseGrayGy1 Gy 1 J/kgDose equivalentSievertSv1 Sv 1 J/kgMultiple of unitPrefixMultiple of unitPrefixMultiple of unitPrefixNameSymbolNameSymbolNameSymbol 1018 ExaE102 Hectoh10 9 Nanon1015 PetaP10 Decada10 12 Picop1012 TeraT10 1 Decid10 15 Femtof109 GigaG10 2

7 Centic10 18 Attoa106 MegaM10 3 Millim103 Kilok10 6 Micro ForceNdynkgf11 72 10 11 10 72 10 65 1051 ViscosityPa scPP11 1031 101 10 311 10 21 10 11 1021 StressPa or N/m2 MPa or N/mm2kgf/mm2kgf/cm211 10 72 10 72 10 51 72 10 72 65 6511 65 65 10 21 10 21 Kinematic viscositym2/scStSt11 1061 1041 10 611 10 21 10 41 1021 Work, energy, heat quantityJkW hkgf 78 10 72 10 89 10 98 0 07 10 70 10 05 79 10 58 1021 Power process rate/power , heat flowWkgf m/ 72 10 62 10 0 10 33 10 29 72 10 95 10 31 Thermal conductivityW/ m K kcal/ m h C 0 10 791 Coefficient of heat transferW/ m2 K kcal/ m2 h C 0 10 791 Specific heat J/ kg K kcal/ kg C cal/ g C 89 10 05 10 31 PressurePakPaMPabarkgf/cm2atmmmH2 OmmHg or Torr11 10 31 10 61 10 72 10 23 10 72 10 62 10 31 10311 10 31 10 72 10 23 10 72 621 1061 10311 72 72 62 1031 1051 1021 10 23 10 72 62 65 65 65 10 65 10 41 10 11 59 25 25 25 10 23 00 65 10 65 10 65 10 51 10 41 10 59 10 22 22 10 22

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