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Gravity is an attractive force that affects and is effected by all mass and - in general relativity - energy, pressure and stress. Prefer newtonian-gravity or general-relativity if sensible.

4
votes
What you are trying to do is recast gravity as a noninertial Force. For this "idea" to work out, you need one or more of the following: a fine tuned rescaling factor that shrinks stuff inside … gravity wells at a speed proportional to the outward volumetric velocity mass is traveling outwards, OR a geometric formalism to explain why stuff does not change in volume over time (maybe you are …
answered Jul 23 '12 by lurscher
4
votes
there will be a infinitesimal increase in the mass given by the relativistic expression of angular velocity and inertia, but it will be completely undetectable at the velocities you can rotate a mater …
answered Sep 5 '12 by lurscher
1
vote
The method of images works on the electrostatic case because the axis of symmetry of the mirror charges induces an equipotential line that is equivalent to the infinite conductor surface. In gravitati …
answered Jan 31 '15 by lurscher
-1
votes
empty space 2) A has an associated gravity, with associated space-time curvature 3) now system B, will approach the region where A is found, and measure space-time curvature, but will not interact … and B states "gravity is quantum" potential outcome: A and B are statistically correlated (entangled), supporting that B coupled with a linear superposition of gravitational fields "gravity is …
answered Mar 15 '11 by lurscher
0
votes
The assertion is simply wrong. The existence of negative mass by itself would not invalidate the equivalence principle, however negative mass next to a positive mass would shield $r^{-2}$ asymptotic g …
answered Jul 4 '17 by lurscher
34
votes
2answers
Did Gravity Probe B provide any bounds on Einstein-Cartan torsion? is a non-zero torsion value at odds with the results regarding frame-dragging and geodetic effects? …
asked Oct 8 '11 by lurscher
1
vote
You can always create discontinuous waves (which are solutions that exists even in the total absence of sources (be them gravitational or electromagnetic) You can always write a discontinuous functio …
answered Jun 8 '11 by lurscher
1
vote
If you take a piece of paper, it does not matter how you twist the paper, its intrinsic curvature is zero. (only extrinsic curvature may be non-zero) If you take that piece of paper and make a cylind …
answered Nov 13 '11 by lurscher
2
votes
The first-order approximation to the radiation power from the quadrupole term is given by $$ P = - \frac{128}{5 c^5} G M^2 R^4 \Omega^6 $$ where $\Omega$ is the angular speed and $M$ and $R$ are the …
answered Jul 30 '12 by lurscher
0
votes
As has been shown experimentally organic diamagnetism works 'almost' as a way to counter (or enhance) gravity. There are a bit caveats that affect it though: diamagnetism is not perfectly uniform …
answered Jun 24 '13 by lurscher
1
vote
As a brainstorming answer, lets calculate the binding energy in another way: suppose we have N electron in the sphere, the electrostatic energy to bring a new electron into the sphere is $Ne/R$. If w …
answered Mar 10 '11 by lurscher
2
votes
Is it possible that universe is not expanding but instead being dragged into singularity? Yes. That possibility is called the Big Rip. 'dragged into a singularity' can happen even while 'expanding', …
answered Jun 22 '15 by lurscher
2
votes
1answer
I'm looking for existing papers studying a variation to Einstein equation that does not rely on the annoying matter conservation identity: $$ T_{\mu \nu; \nu} = 0 $$ And instead tries to equate the …
asked Aug 22 '12 by lurscher
1
vote
At the beginnings of the XX century, Kaluza made an interesting exercise by writing down a 5D version of General Relativity, but it turned out to be really complicated and hard to interpret. So he mad …
answered Oct 18 '17 by lurscher
2
votes
would not have occurred. Currently the only known source of expansion components of gravity is the cosmological constant, which, incidentally, is precisely the physical quantity that our theories fail to predict by the largest amount: 120 or 60 orders of magnitude, depending on whom you ask. …
answered Jun 24 '11 by lurscher

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