From: utzoo!mark
Newsgroups: net.misc
Title: Re: A Relavtistically Simple Question 
Article-I.D.: utzoo.2769
Posted: Fri Jan 21 00:17:58 1983
Received: Fri Jan 21 00:17:58 1983
References: psuvax.1153 

net.physics hasn't gone away here, at least.  i suspect the original posting
simply got lost, which seems a common enough occurance.
the question was:  can i make a digital clock, which simply counts waves 
in the power line, lose an hour by whirling it over my head very fast?  what
happens to the extra line pulses?

this much-abused instrument is not in fact a clock; it is just a display.
the clock is whatever is keeping the line frequency at a nice even 60 hertz.
if you put a self-contained clock on the other "clock" while spinning it, the
new clock would lose an hour.

there are actually things in the display which are local-time-dependent, ie
the electronics of it.  while it is being whirled, it is slowed, so the
line frequency looks very high to it.  but the actual number of cycles is,
of course, not changed by this.

			mARK bLOORE
			univ. of toronto