Le 05/04/2011 17:51, Jim Lux a écrit :
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.
Isn't his premiss wrong? I see no required relation between s^-1 or
1/s and angular measure. If I am dropping rocks into a pool at 1 second
intervals I get splashes at 1Hz . Not many radians in that. Maybe that
is why cps was dropped.
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.
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