On Sunday 03 December 2006 03:49, Mikkel L. Ellertson wrote: > Anne Wilson wrote: > > On Saturday 02 December 2006 21:56, Aaron Konstam wrote: > >> Section form man usits: > >> INTERACTING WITH ‘UNITS’ > >> To invoke units for interactive use, type ‘units’ at your > >> shell prompt. > >> The program will print something like this: > >> > >> 2131 units, 53 prefixes, 24 nonlinear units > > > > I presume that they are the units of measurement, including 24 nonlinear > > units, though I'm not so sure about the prefixes. > > > > Amme > > Prefixes are defined separately from base units. In order to get > centimeters, the units database defines centi- and c- as prefixes. > Prefixes can appear alone with no unit following them. An exponent > applies only to the immediately preceding unit and its prefix so > that cm^3 or centimeter^3 refer to cubic centimeters but > centi*meter^3 refers to hundredths of cubic meters. Only one prefix > is permitted per unit, so micromicrofarad will fail, but > micro*microfarad will work, as will micro microfarad.. > That's getting technical :-) Thanks for the explanation, Mikkel. One more bit of knowledge. Anne
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