[Om] units, was Re: [Om3] svn.openmath.org is now opened

John Ogilvie ogilvie at cecm.sfu.ca
Tue Jul 10 19:12:59 CEST 2007

In the list below of dimensions, mass appears twice.  Clearly this double
appearance is incorrect.  The correct name of the quantity for which the
SI unit is 'mol' is 'amount of [chemical] substance', with appropriate
technical connotations for 'substance'.
      It would be worth while and appropriate to add the SI units radian,
for angle within a plane, and steradian, for solid angle, but neither
degree nor grad.
      J. F. Ogilvie
On Tue, 10 Jul 2007, Jan Willem Knopper wrote:

> A possibility here would be to split the dimensions for the seven base
> SI units from the rest.
> The dimensions for the seven base SI units are length, mass, time,
> electric current, thermodynamic temperature, mass, and luminous
> intensity. (m, kg, s, A, K, mol, cd).
> (see http://en.wikipedia.org/wiki/SI_base_unit and
> http://en.wikipedia.org/wiki/SI_derived_unit)
> Is it possible to add the SI derived unit radian (symbol:rad,
> dimension:angle) and the non SI unit degree (symbol: U+00B0, 1 degree=
> 2pi/360 rad) ?
> Regards,
> Jan Willem Knopper

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