On Wednesday 07 September 2005 12:14, Bill Hooper wrote: > On 2005 Sep 6 , at 10:06 PM, Pierre Abbat wrote: > > The ounce is 1/3 as precise as the meter. > > Nonsense. The ounce is defined in terms of the metre by EXACT relations > between ounces and metres. Therefore there is no additional error > introduced when calculating the ounce from the metre. Thus, the two > have exactly the same preciseness.
The ounce is 1/3 as precise as the meter because it is a volume unit. The liter is likewise 1/3 as precise as the meter. That is, if someone makes an error of 1E-12 in measuring something in meters, he makes an error of 3E-12 in measuring something in liters.
