CONVENTIONS IN WRITING SI UNITS
The following convensions (rules) should be strictly followed while writing SI units.
i.
While writing a unit, only its singular form is used.
For
example, the mass of any substance
should be written as kg not as kgs.
Distances should be expressed in km not in kms,
e.g., ten kilogram is
written as
10 kg 10
kgs
(correct) (incorrect)
ii.
The abbreviation of any unit does not have full stop (.) at the
end, unless it appears at the end of a sentence. Therefore, no full stop is
placed either in between or at the end of the symbol of the unit.
For example,
kg kg. cm cm.
(correct) (incorrect)
(correct)
(incorrect)
iii.
One space is left between the last digit of a numeral and the
symbol of the unit.
For example,
10 m 10m 5 g 5g
(correct) (incorrect) (correct) (incorrect)
iv.
Words and Symbols
should not be mixed.
For example,
kilogram per cubic metre kg/m3 kilogram/m3
kg
per cubic metre
(correct) (correct) (incorrect)
(incorrect)
v.
With numerals,
the symbol of the unit should be written.
For
example,
100 cm one hundred cm 100
centimetres
(correct)
(incorrect) (incorrect)
vi.
The names of the
units derived from people’s names are written in small letters.
For
example, the unit named after Joule is written as joule, (symbol: J). The unit
of force named after newton is written as newton, (symbol: N).
vii.
The sign of
degree (°) is not written when Kelvin scale is employed.
For
example, temperature of 273 kelvin is written as 273 K and not 273°K.
273 K 273°K
(correct) (incorrect)
No comments:
Post a Comment