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tech / sci.physics.relativity / [SR] Relativity and spinning disc

[SR] Relativity and spinning disc

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From: r.hac...@tiscali.fr (Richard Hachel)

by: Richard Hachel - Sun, 19 Dec 2021 21:39 UTC

The very sympathetic Jean-Pierre Messager questioning I don't know what
(my simple calculation of the precession of mercury or my equations
relating to the rotating disc and what happens to it in relativistic
movement (it turns very quickly), I give here the equations given on the
forums a long time ago.

<http://news2.nemoweb.net/jntp?F1XF_wGfTYsUhK8kV1Izgmj7co8@jntp/Data.Media:1>

I give the radius of the disc, its circumference, and its surface as a
function of its relativistic angular speed.

R.H.

Re: [SR] Relativity and spinning disc

<spo9lo$11rm$1@gioia.aioe.org>

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Subject: Re: [SR] Relativity and spinning disc
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by: Python - Sun, 19 Dec 2021 21:53 UTC

Richard "Hachel" Lengrand (M.D.) wrote:
> ... questioning I don't know what
> (my simple calculation of the precession of mercury or my equations
> relating to the rotating disc and what happens to it in relativistic
> movement (it turns very quickly), I give here the equations given on the
> forums a long time ago.
>
> <http://news2.nemoweb.net/jntp?F1XF_wGfTYsUhK8kV1Izgmj7co8@jntp/Data.Media:1>
>
>
> I give the radius of the disc, its circumference, and its surface as a
> function of its relativistic angular speed.

No definition of variables, so meaningless equations. Typically your
style.

Moreover there is nothing there about 43″ for perihelion precession
(per century). Why are you lying M. Lengrand, does it make you feel
better?

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From: r.hac...@tiscali.fr (Richard Hachel)

by: Richard Hachel - Sun, 19 Dec 2021 22:10 UTC

Le 19/12/2021 à 22:53, Python a écrit :

>> <http://news2.nemoweb.net/jntp?F1XF_wGfTYsUhK8kV1Izgmj7co8@jntp/Data.Media:1>

> Moreover there is nothing there about 43″ for perihelion precession
> (per century).

Bah si.

C'est suffisant pour le calculer.

Tu peux le faire.

J'ai pu les calculs (triviaux) mais tu peux les faire toi-même. Qu'est
ce qu'il te faut? Attends...

Le rayon de l'orbite, la période de révolution.

Mon équation.

Et pis je crois que c'est tout.

T=58j15h30'

d=57,9 millions de kms.

D'où l'extraordinaire facilité du calcul de 43" d'arc par siècle
environ.

C'est facile.

Encore faut-il savoir qu'en RR, si je fais tourner un disque, chaque
point du disque, y compris sur la circonférence n'est pas en
référentiel galiléen uniforme, même transitoirement.

C'est là encore une grave erreur des scientifiques que de prendre une
idée pour autre et de confondre deux choses différentes.

Bon, je te laisse, mon bébé d'amour, j'ai d'autres choses à faire.

Je te fais un bisou.

Bonne réflexion relativiste.

R.H.

Re: [SR] Relativity and spinning disc

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by: Python - Sun, 19 Dec 2021 22:52 UTC

Richard "Hachel" Lengrand (M.D.) wrote:
> Le 19/12/2021 à 22:53, Python a écrit :
>
>>> <http://news2.nemoweb.net/jntp?F1XF_wGfTYsUhK8kV1Izgmj7co8@jntp/Data.Media:1>
>
>
>> Moreover there is nothing there about 43″ for perihelion precession
>> (per century).
>
> Bah si.
>
> C'est suffisant pour le calculer.

Blatant lie and delusion, Richard. Even on fr.sci.* you
didn't claim that.

No surprise that you're evading my question. You are again
lying, Richard. Why? Does it make you feel better?

Re: [SR] Relativity and spinning disc

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by: rotchm - Mon, 20 Dec 2021 01:06 UTC

Subject	Author
[SR] Relativity and spinning disc	Richard Hachel
Re: [SR] Relativity and spinning disc	Python
Re: [SR] Relativity and spinning disc	Richard Hachel
Re: [SR] Relativity and spinning disc	Python
Re: [SR] Relativity and spinning disc	rotchm