[ARC5] SI Units - Careless Errors Abound

[Roy Morgan]

On Jan 7, 2012, at 3:07 PM, Mike Morrow wrote:
> Other examples of careless unit errors are using:
>
>  hz vs. Hz        Unit *symbols* are capitalized when it represents  
> a proper name....
> Symbols should mean something.

Mike and others.  The complete (American) version of the SI units  
usage standards can be read in NIST Special Publication 811
The NIST Guide for the use of the International System of Units

NIST: Special Publication 811
PDF version at: http://physics.nist.gov/cuu/pdf/sp811.pdf

readable version by section:
http://www.nist.gov/pml/pubs/sp811/index.cfm

There are seven "SI base units".  These are defined at:
http://physics.nist.gov/cuu/Units/current.html

The are:
Base quantity Name Symbol
  length meter m
  mass kilogram   kg
  time second s
  electric current ampere A
  thermodynamic temperature  kelvin K
  amount of substance mole mol
  luminous intensity candela cd

Happy unit-ing!

Roy

Roy Morgan
k1lky at earthlink.net
K1LKY Since 1958 - Keep 'em Glowing!