Appendix B

PROPERTIES OF MATERIALS
SI BASE UNITS

The international system of units (SI) is based on the seven units given here.

 

Table B 1

Length metre m
Mass kilogram kg
Thermodynamic temperature kelvin K
Time second s
Luminous intensity candela cd
Amount of a substance mole mol
Electrical current ampere A
SI DEFINED UNITS

The following are the defined units with standard symbols.

 

Table B 2

Force newton, N 1 N = 1 kgm/s2
Power watt, W 1 W = 1 J/s
Pressure pascal, Pa 1 Pa = 1 N/m2
Temperature kelvin, K K = °C + 273.15
Work, heat, energy joule, J 1 J = 1 Nm
Potential difference volt, V 1 V = 1 W/A
Electrical resistance ohm, ς 1 ς = 1 V/A
SI DERIVED UNITS

Derived units are obtained from the governing ...

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