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 | 1N=1 kg m/s2 |
Power | watt, W | 1W=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=1N m |
Potential difference | volt, V | 1V=1 W/A |
Electrical resistance | ohm, ς | 1 ς = 1 V/A |
SI DEFINED UNITS
Derived units are obtained from the governing equations ...
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