Fundamentals of Materials Science and Engineering: An Integrated Approach, 3e

GTBL042-App-A GTBL042-Callister-v3 September 21, 2007 19:50

800 • Appendix A / The International System of Units (SI)

Table A.2 Some of the SI Derived Units

Special

Quantity Name Formula Symbola

Area square meter m^2 —

Volume cubic meter m^3 —

Velocity meter per second m/s —

Density kilogram per cubic meter kg/m^3 —

Concentration moles per cubic meter mol/m^3 —

Force newton kg-m/s^2 N

Energy joule kg-m^2 /s^2 , N-m J

Stress pascal kg/m-s^2 , N/m^2 Pa

Strain — m/m —

Power, radiant flux watt kg-m^2 /s^3 , J/s W

Viscosity pascal-second kg/m-s Pa-s

Frequency (of a periodic

phenomenon)

hertz s−^1 Hz

Electric charge coulomb A-s C

Electric potential volt kg-m^2 /s^2 -C V

Capacitance farad s^2 -C/kg-m^2 F

Electric resistance ohm kg-m^2 /s-C^2 

Magnetic flux weber kg-m^2 /s-C Wb

Magnetic flux density tesla kg/s-C, Wb/m^2 (T)

aT is a special symbol approved for SI but not used in this text; here, the name tesla is used.

Table A.3 SI Multiple and Submultiple

Prefixes

Factor by Which

Multiplied Prefix Symbol

109 giga G

106 mega M

103 kilo k

10 −^2 centia c

10 −^3 milli m

10 −^6 micro μ

10 −^9 nano n

10 −^12 pico p

aAvoided when possible.