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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