TROLL: Re: What is the standard mass-density of a cubic decimeter of pure water?
"Don1" <[Only registered users see links. ]> wrote in message
or maybe 1000kg per m^3.
ever notice how, length is calibrated in meters, weight is in g, and volume
in l aka dm^3. with these measures, one has to do scaling depending on their
basic choice of units (and at the same time, doing such shows that the units
are not that well corellated).
why all this?
if we define density as mass/volume, then there is a problem if the units
don't match up. we don't get a nice 1, but some other number.
so, with kg/m^3, the density of water is 1000.
at the same time, one could also measure mass in terms of Mg, where the
density of water, in Mg/m^3, is once again 1.
however, it could be argued, the Mg is an "unusual" unit vs the kg and g.
yes, it is just a matter of scale, but then again, so is most unit
then again, the g matches with the cm^3, this would make sense, if one
decided to measure length in cm. this may or may not be a big deal, after
all, many everyday items are measured in cm. once again, density is 1.
however, one then has to deal with a world callibrated in cm and g, vs one
calibrated in m and kg.
one may just have to live with a definition of density of water being 1000
in the case where kg and m are chosen...
if one really wanted, they could probably build a whole system of units
based off the inch or foot, but this would be both pointless and oddball.
such profound effects of all this? nothing really. many would likely regard
unit scaling as a rather trivial matter.