Next message: george huxtable: "Re: Timing Lunars with a Rock"
There is one more problem with such crude pendulum
which has not been addressed:-)
And the effect is more substantial than some other effects
mentioned so far:
The preiod of a pendulum DOES depend on the amplitude.
You can neglect this dependence onbly if your pendulum is
very long and the amplitude is very small.
A
On Sun, 17 Jul 2005, Frank Reed wrote:
> Here's a nice trick. A rock on a string
> and an assistant with a bag of
> pebbles will make do for a clock for
> timing the separate sights involved in a
> lunar observation.
