I don't understand what is wrong with 'Hz'. As Time in seconds is a SI unit, Frequency is the reciprocal value of time, f=1/T, Frequency is not a SI base unit but a SI coherent derived unit (in the list with special names and symbols as force, pressure, charge, power, resistance etc.). [11th CGPM, Resolution 12]
So Frequency is defined as the measure of the number of occurrences of a repeating event per unit time. To calculate the frequency, the number of occurrences of the event within a fixed time interval are counted, and then it's divided by the length of the time interval. NIST wording: "The rotational frequency n of a rotating body is defined to be the number of revolutions it makes in a time interval divided by that time interval [4: ISO 80000-3]. The SI unit of this quantity is thus the reciprocal second (s-1)". But perhaps I misunderstand your position, could you give an explanation? Arnold Am 05.04.2011 17:54, schrieb Brooke Clarke: > Hi Jim: > > But what you show violates the SI rules, even though it's the correct > calculation. > > Have Fun, > > Brooke Clarke > http://www.PRC68.com > > > Jim Lux wrote: >> On 4/5/11 8:25 AM, Brooke Clarke wrote: >>> Hi: >>> >>> Just reading at: >>> http://futureboy.us/frinkdata/units.txt >>> >>> First about the candela and all it's problems, then what's a Time Nut >>> issue "Hz ". >>> >>> // This means that, if you follow the rules of the SI, >>> // 1 Hz = 1/s = 1 radian/s which is simply inconsistent and violates >>> basic >>> // ideas of sinusoidal motion, and is simply a stupid definition. >>> >> actually 1/s (= Hz) = 2*pi rad/sec >> >> BTW, if anyone is confused, I have a handy direct reading graph >> published by HP a few decades ago to assist engineers in converting >> from cycles per second to Hertz. I'll see if I can scan it and attach >> it later. I know I really should have mentioned this last Friday. >> _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
