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From: Enes on 28 Nov 2009 03:05
http://en.wikipedia.org/wiki/Pendulum

You can see and hear as it works:
tik...tak, tik..tak, tik..tak (in polish !)

When there is less gravitation:
tiiiiik..........taaak, tiiiiik..........taaak....

The time is quite different, than GR predicts.
Why?
From: Sam Wormley on 28 Nov 2009 09:12
Enes wrote:
> http://en.wikipedia.org/wiki/Pendulum
>
> You can see and hear as it works:
> tik...tak, tik..tak, tik..tak (in polish !)
>
> When there is less gravitation:
> tiiiiik..........taaak, tiiiiik..........taaak....
>
> The time is quite different, than GR predicts.
> Why?


Don't use a pendulum.

http://scienceworld.wolfram.com/physics/Pendulum.html
http://en.wikipedia.org/wiki/Pound-Rebka_experiment
From: tadchem on 28 Nov 2009 09:30
On Nov 28, 3:05 am, Enes <pies_na_teo...(a)vp.pl> wrote:
> http://en.wikipedia.org/wiki/Pendulum
>
> You can see and hear as it works:
> tik...tak, tik..tak, tik..tak (in polish !)
>
> When there is less gravitation:
> tiiiiik..........taaak,  tiiiiik..........taaak....
>
> The time is quite different, than GR predicts.
> Why?

You seem to have forgotten that a simple pendulum measures gravity
against time, and vice versa.

If you know the (presumably constant) length of the pendulum, the
acceleration due to gravity (predicted by GR) and the angular sweep of
the pendulum, then the period is given by the elliptical integral
(series approximation shown as the second equation under the 'Period
of Oscillation' section of the article).

GR predict the period of the pendulum with more than sufficient
accuracy.

Read *all* of the article.

Tom Davidson
Richmond, VA

From: Enes on 28 Nov 2009 12:00
On 28 Lis, 15:12, Sam Wormley <sworml...(a)mchsi.com> wrote:
> Enes wrote:
> >http://en.wikipedia.org/wiki/Pendulum
>
> > You can see and hear as it works:
> > tik...tak, tik..tak, tik..tak (in polish !)
>
> > When there is less gravitation:
> > tiiiiik..........taaak,  tiiiiik..........taaak....
>
> > The time is quite different, than GR predicts.
> > Why?
>
>    Don't use a pendulum.
>
Ok., if you say.
But we have to add next principle (third) to Special Theory of
relativity:
"Don't use a pendulum clock to measure time"
Are you agree?


>    http://scienceworld.wolfram.com/physics/Pendulum.html
>    http://en.wikipedia.org/wiki/Pound-Rebka_experiment
>
It is high time to use a clock in this kind of experiments...
From: Enes on 28 Nov 2009 14:50
On 28 Lis, 15:30, tadchem <tadc...(a)comcast.net> wrote:
> On Nov 28, 3:05 am, Enes <pies_na_teo...(a)vp.pl> wrote:
>
> >http://en.wikipedia.org/wiki/Pendulum
>
> > You can see and hear as it works:
> > tik...tak, tik..tak, tik..tak (in polish !)
>
> > When there is less gravitation:
> > tiiiiik..........taaak,  tiiiiik..........taaak....
>
> > The time is quite different, than GR predicts.
> > Why?
>
> You seem to have forgotten that a simple pendulum measures
> gravity against time, and vice versa.
>
Which clock is good to measure time?
Does it depends of time only and not of gravity?

> If you know the (presumably constant) length of the pendulum, the
> acceleration due to gravity (predicted by GR) and the angular sweep of
> the pendulum, then the period is given by the elliptical integral
> (series approximation shown as the second equation under the 'Period
> of Oscillation' section of the article).
>
> GR predict the period of the pendulum with more than sufficient
> accuracy.
>
Please, show me a pendulum working as a clock, as GR predicts.

> Read *all* of the article.
>
> Tom Davidson
> Richmond, VA

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