[time-nuts] gravity controlled pendulumn clock?
jimlux at earthlink.net
Tue Dec 13 12:32:05 EST 2011
On 12/13/11 8:57 AM, Bob Bownes wrote:
> What's metric or Common Measure about seconds? ;)
AN excellent point.. aren't seconds the only unit that is the same in
basically all measurement systems? there's cgs, mks, SI, Imperial, US
Customary, Avoirdupois, etc and they all use seconds.
And since this is timenuts.. where did the second originate (I recall a
story about Galileo counting heartbeats for his experiments rolling
balls down ramps... but that sounds a bit too convenient).
Is it just dividing hours by 60 to get minutes and minutes by 60 to get
seconds (as my daughter was wont to say when learning fractions: curse
makes it seem to be Claudius Ptolemy
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