Re: POTENTIAL PROBLEM

From: Pmb (someone_at_somewhere.com)
Date: 12/24/04 

Date: Thu, 23 Dec 2004 21:11:39 -0500

"Sesselmann" <steven@hotmail.com> wrote in message
news:1gpali4.z5x0e23p5jc0N%steven@hotmail.com...
> Tom Roberts <tjroberts@lucent.com> wrote:
>
> > Sesselmann wrote:
> > > For what it's worth, should we concider our universe to be a closed or
> > > an open system ?
> >
> > In the FRW models applicable to cosmology, space can have either
> > positive, negative, or zero curvature, with this last a "boundary"
> > between the others. Positive spatial curvature implies the manifold is
> > spatially closed, but the others are open. Current measurements are
> > consistent with zero spatial curvature, which is a "knife edge" between
> > the other 2 possibilities.
> >
> >
> > > Since the only known way to create 3D space is to separate 4 or more
> > > masses using a force, all that space we see must have come at an
initial
> > > energy cost.
> >
> > I haven't a clue what you are trying to say.
> >
> >
> > Tom Roberts tjroberts@lucent.com
>
> Tom,
>
> 1)
> If you had a universe with only one mass or particle of infinitely small
> size (say of the plank energy size), then there could be no 3D space, as
> there would be nothing to relate the mass to. So the universe has zero
> dimensions, it is a point.
>
> 2)
> In a hypothetical universe of two such masses there could only be one
> dimension. The distance between the masses. In this universe the
> attractive force between the two bodies would be the same for all
> distances of separation.
>
> 3)
> In a universe with three such masses, the universe would be 2
> dimensional and the force of attraction between the masses would be
> linear. ie. twice the distance half the force.
>
> 4)
> Only in a universe with 4 or more masses can the force be inversely
> proportional to the square of the separation.
>
> (Tom, please excuse me for using the term Force, it does not mean that I
> am trying to bring back old Newton,)

The use of the term "force" does not go against GR. Even Einstein used the
term to refer to gravity. GR merely states that gravitational forces are
indistinguishable in nature from inertial forces, and therefore, Einstein
concluded, inertial forces are "real" forces since the gravitational force
is a "real" force.

Pmb

Relevant Pages

  • Dark matter g-field due to daughter universes linked to black holes...A conjecture.
    ... PROPAGATING BACK INTO OUR UNIVERSE. ... The total black hole mass interior to a galactocentric spherical ... 'Klein-Gordon' type equation relating the mass of a bh and that of the ... (Mp, Me, and Mu are proton, electron and universe masses. ...
    (sci.astro)
  • Re: Solstice
    ... that angular momentum is determined by an object's angular velocity ... are defined relative to other masses in the universe - not ...
    (sci.astro.amateur)
  • Re: How to replace sendmail with postfix?
    ... > the author polarizes the masses. ... I happen to very much dislike his (view ... > of the) universe, and apparently you feel different about it. ...
    (comp.unix.bsd.freebsd.misc)
  • Re: Universe with four masses
    ... > In a hypothetical universe with _only four point masses, ... > universe there is a problem... ... eachother, because it is meaningless. ... > be at 60 degree angles to eachother, or the combined angles can not ...
    (sci.physics.relativity)
  • Re: POTENTIAL PROBLEM
    ... Tom Roberts wrote: ... If you had a universe with only one mass or particle of infinitely small ... size (say of the plank energy size), then there could be no 3D space, as ... In a hypothetical universe of two such masses there could only be one ...
    (sci.physics.relativity)