Re: what is the mass of spacetime?
- From: BURT <macromitch@xxxxxxxxx>
- Date: Mon, 06 Aug 2007 21:30:30 -0700
On Aug 6, 12:55 am, The TimeLord <mathnphysics-...@xxxxxxxxxxxxx>
wrote:
Ralph wrote in sci.physics.relativity:
hi,
according to relativity theory, spacetime is a field which
has energy, thus it also has mass, and therefore also
a specific type of materiality.
No. Space-time is basically an entity with coordinates. It is not a
field and has no energy and no mass.
[...]
when objects are far apart, their energy is greater than
when they are bounded together owing to the newtonian
potential energy contribution. how can you tell whether
the extra mass of the objects that apart came from the
gravitational field (or Weyl tensor) or from the energy it
takes to separate the objects?
First of all, not all energy is equivalent. Rest mass pops out as a
constant of integration in the calculation of kinetic energy.
Potential energy is reflective of applied force. So confusing rest
mass energy with potential energy is not justifiable.
--
// The TimeLord says:
// Pogo 2.0 = We have met the aliens, and they are us!
space-time can be empty not void.
BURT SCHWARZKAUF
.
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