1964_METRICATION_ORDINANCE — Page 5

CAP. 214]

Metrication

[1987 Ed.

Quantity Name Symbol Expression in terms of other SI units

electric resistance ohm Ω V/A

conductance siemens S A/V

magnetic flux weber Wb V S

magnetic flux density tesla T

inductance henry H Wb/A

luminous flux lumen lm cd sr

illuminance lux lx cd sr/m2

radioactivity becquerel Bq 1/s

amount of absorbed gray Gy J/kg

radiation

PART IV

The SI Prefixes (See Note (5))

Factor by which the Name Symbol unit is multiplied

1018 exa E

1015 peta P

1012 tera T

109 giga G

106 mega M

103 kilo k

102 hecto h

101 deca da

10-1 deci d

10-2 centi c

10-3 milli m

10-6 micro µ

10-9 nano n

10-12 pico p

10-15 10-18 femto atto f a

Notes

(1) An SI base unit is a unit recommended by the General Conference of Weights and Measures as a fundamental unit of SI. By convention the seven SI base units are regarded as dimensionally independent,

(2) An SI supplementary unit is a unit for the time being not classified by the General Conference of Weights and Measures as either an SI base or an SI derived unit.

(3) An SI derived unit is a unit which can be expressed algebraically in terms of the SI base units and/or the SI supplementary units.

(4) The derived units in Part III have been given special names and symbols which may themselves be used to express other derived units.

(5) The SI prefixes are used to form names and symbols of decimal multiples and submultiples of the SI units.

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