[time-nuts] Crude Survey Technique

Don Latham djl at montana.com
Thu Nov 21 20:06:54 EST 2013


Coriolis ain't a force :-)
A real tall pole isn't required, just another person

Bill Beam
> On Thu, 21 Nov 2013 15:28:32 -0800, Chris Albertson wrote:
>
>>If you need a very tall pole that is 100% vertical then hang a
>>weighted rope from a tall support.  Then go to the other end and watch
>>the seconds tick down.
>
>
> Be carefull!...  A plumb bob does not hang vertically (point to center
> of Earth).
> Since the suspension point is undergoing accelerated motion the bob will
> be
> deflected toword the equator.  This problem also applies to bubble
> levels, etc.
> And there are other perturbations due to Sun, Moon, Jupiter, etc. which
> are not constant.
> Which leads to the question:  How to make the pole vertical?
>
> Newtons laws are NOT valid in a noninertial frame.  (That's why the
> Coriolis force
> was invented.)
>
> Thus the term "rocket science".
>
>
> Bill Beam
> NL7F
>
>
>
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-- 
"The power of accurate observation is commonly called cynicism by those
who have not got it."
 -George Bernard Shaw


Dr. Don Latham AJ7LL
Six Mile Systems LLC
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
Skype: buffler2
www.lightningforensics.com
www.sixmilesystems.com




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