23 Aug
2006
23 Aug
'06
2:57 p.m.
On 2006-08-23, Matthias Troyer <troyer@itp.phys.ethz.ch> wrote:
- Nm would be a "dimension"
Not really. It is the unit. The dimension is: MASS * LENGTH^2 * TIME^2
- 1 Nm would be a "quantity" - a torque measured in Nm or an energy measured in Nm would be two distinct units - 1 Nm as torque, 1 Nm as energy or 1 J as energy would be three distinct measures
I think as far as a dimensionality checking goes, they are all the same. As far as a units checking goes, Nm and J *could* be distinguished. It's an interesting question as to what, exactly, "energy" and "torque" are once you try to separate away the dimensionality and units bits... :-) phil -- change name before "@" to "phil" for email