Appendix Il Tables of Physical Constants The International System of Units (SI or mksA System) In the SI unit system,essentially four base units,the meter,the kilogram(for the mass),the second,and the ampere are defined. Further base units are the Kelvin,the mole (for the amount of substance),and the candela(for the luminous intensity).All other units are derived units as shown in the table below.Even though the use of the SI unit system is highly recommended,other unit systems are still widely used. Expression in terms of Quantity Name Symbol Other SI units SI base units Force Newton N kg·m/s2 Energy,work Joule J Nm=V·A·skgm2s2 Pressure Pascal Pa N/m2 kg/m·s2 El.charge Coulomb C J/V A·s Power Watt W J/s kg·m2s3 El.potential Volt V W/A kg·m2A·s3 El.resistance Ohm V/A kg·m21A2.s3 El.conductance Siemens 心 A/V A2·s3kg·m2 Magn.flux Weber Wb V·s kg·m21A·s2 Magn.induction Tesla T Wb/m2 kgA·s2 Inductance Henry H Wb/A kg·m21A2.s2 Capacitance Farad CIV A2·s4/kg·m2Appendix II In the SI unit system, essentially four base units, the meter, the kilogram (for the mass), the second, and the ampere are defined. Further base units are the Kelvin, the mole (for the amount of substance), and the candela (for the luminous intensity). All other units are derived units as shown in the table below. Even though the use of the SI unit system is highly recommended, other unit systems are still widely used. Expression in terms of Quantity Name Symbol Other SI units SI base units Force Newton N — kg  m/s2 Energy, work Joule J N  m
V  A  s kg  m2/s2 Pressure Pascal Pa N/m2 kg/m  s2 El. charge Coulomb C J/V A  s Power Watt W J/s kg  m2/s3 El. potential Volt V W/A kg  m2/A  s3 El. resistance Ohm # V/A kg  m2/A2  s3 El. conductance Siemens S A/V A2  s3/kg  m2 Magn. flux Weber Wb V  s kg  m2/A  s2 Magn. induction Tesla T Wb/m2 kg/A  s2 Inductance Henry H Wb/A kg  m2/A2  s2 Capacitance Farad F C/V A2  s4/kg  m2 Tables of Physical Constants The International System of Units (SI or mksA System)