I wrote: >> The truth of the matter is that >> the multiple ALWAYS* can be chosen so the value is between 0.1 and 1000. >> Sometimes it is not convenient to do so but it is always possible*.
and Jim Freysinger replied: > ... but that > "usually" is provided most often to allow for other cases. For example, > in tables one might prefer to use the same unit throughout. But the issue was not concerned with whether there were situations in which one had good reason not to select a prefix that gives values between 0.1 and 1000. The question was whether or not it is POSSIBLE. I agree that there are plenty of cases where there are good reasons to do otherwise, but it is ALWAY* possible to select a prefix that gives a value between 0.1 and 1000. Regards, Bill Hooper retired physics professor, Florida, USA *I repeat that the one exception is for values much bigger than the biggest available prefix and much smaller than the smallest. Even this allows the "rule" to be applied well beyond the range of 10^-24 to 10^+24 as I previously had suggested. It can be applied to values as big as 10^27 and as small as 10^-25. The value 1 x 10^27 can be written as 1000 x 10^24 and allows the use of the prefix yotta, Y (for 10^24). Similarly 1 x 10^-25 can be written as 0.1 x 10^-24 and that allows the use of yocto, y (for 10^-24). -------------------------------------- "Simplification" begins with "SI" --------------------------------------
