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Newsgroups: sci.physics.relativity
Subject: Re: The failure of the unified field theory means general relativity fails.
From: nospam@de-ster.demon.nl (J. J. Lodder)
Reply-To: jjlxa31@xs4all.nl (J. J. Lodder)
Date: Thu, 4 Jul 2024 21:29:25 +0200
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Ross Finlayson <ross.a.finlayson@gmail.com> wrote:

> On 06/26/2024 12:24 AM, J. J. Lodder wrote:
> > Ross Finlayson <ross.a.finlayson@gmail.com> wrote:
> >
> >> On 06/24/2024 11:49 PM, Thomas Heger wrote:
> >>> Am Dienstag000025, 25.06.2024 um 05:57 schrieb Tom Roberts:
> >>>
> >>>>>> Nope. YOU have imposed specific units onto the formula/equation. The
> >>>>>> equation itself does not impose any particular units on its variables
> >>>>>> and constants [@], it merely requires that they be self-consistent.
> >>>>>>
> >>>>>>     [@] There are many systems of units in common use. You
> >>>>>>     seem to think there is only one.
> >>>>>
> >>>>> A forteriori, any result that depends on any particular choice
> >>>>> of units (or dimensions) is unphysical.
> >>>>
> >>>> Yes, of course. Good point. Similarly, any result that depends on
> >>>> choice of coordinates is unphysical.
> >>>>
> >>>
> >>> Not quite...
> >>>
> >>> Because velocity is 'relative' (relative in respect to what you regard
> >>> as 'stationary'), kinetic energy is frame dependent.
> >>>
> >>> Since the used coordinate system defines 'stationary', you need a
> >>> coordinate system for kinetic energy and that for practically everything
> >>> else.
> >>>
> >>> TH
> >>
> >> When I hear "unphysical" I think it means "in the mathematical
> >> representation and having no attachment to the physical representation,
> >> in the system of units of the dimensional analysis in the
> >> geometric setting".
> >>
> >> The dimensional analysis and attachment to geometry and
> >> arithmetic usually is about the only "physical" there is.
> >
> > Dimensional analysis has nothing to do with physics.
> > Dimensions are man-made conventions.
> > Nothing would change if the whole concept had never been invented.
> >
> >> (Geometry and arithmetic and the objects of analysis
> >> and so on.)
> >>
> >> Things like "negative time" and "anti-deSitter space" are
> >> unphysical, as are the non-real parts of complex analysis,
> >> usually, though for example if you consider the Cartanian
> >> as essentially different from the Gaussian-Eulerian,
> >> complex analysis, then the Majorana spinor makes an
> >> example of a detectable observable, though, one might
> >> aver that that's its real part, in the hypercomplex.
> >
> > Well, yes, but that is another meaning of 'unphysical,
> >
> > Jan
> >
> 
> Yet, "conservation", i.e. "neither the destruction or creation",
> of quantities, is exactly as according to the quantity its units.

Conservation laws do no depend on units and dimensions in any way.

> The, "dimensionless", when a usual sort of "dimensional analysis"
> is the Buckingham-Pi approach, is a detachment of sorts from
> the "dimensional analysis".

Yes, standard dimensional analysis,

Jan