black hole myth

[skeptic1]

When an object enters the gravitational field of a black hole it accelerates towards the singularity. According to E=mc^2 the object will gain energy and mass as its velocity increases. Since energy and mass cannot be created the increase in mass of the object must come from the black hole with a corresponding reduction in the mass of the black hole. If there are several objects being pulled towards the black hole gravity must transfer mass to all the objects and at some point the reduction of mass will cause it not to be a black hole. At that point does the singularity expand back to the size of a smaller neutron star and the black hole cease to exist? If gravity transfers mass to other objects wouldn't this also occur before the sun collapses into a black hole and prevent the formation of the black hole? The relationship between gravity and energy is contradictory. If you fire a bullet into the air does its mass increase to account for potential energy or decrease because its velocity is decreasing?

There are no black holes, E<>mc^2, and there is no force of gravity.

[Phi for All]

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Moderator Note

OK, just a bit off the mainstream for the Relativity section, so we'll move this discussion to Speculations. Please be sure to read the rules governing that section.

[Enthalpy]

A black hole isn't that different from any mass... it's more concentrated. The path of an object in the field of a black hole is usually as near any mass: it passes by, is deviated and goes away. For an object to be captured by gravitation, it must brake, for instance by a collision, or by the slingshot assistance of a moon.

 

The object gaining kinetic energy loses gravitational energy.

 

I'm not sure at all that mass+energy is conserved when masses coalesce. I've read conflicting opinions about that.

[Bignose]

According to E=mc^2 the object will gain energy and mass as its velocity increases.

That is not what this equation says at all. Velocity as a variable isn't even in this equation. There is a constant velocity, c, but it neither increases nor decreases. It is a constant.

[imatfaal]

When an object enters the gravitational field of a black hole it accelerates towards the singularity.

The singularity is very dubious - our equations say it exists but we doubt the equations validity at the intersection of QM and GR

According to E=mc^2 the object will gain energy and mass as its velocity increases.

Nope - see bignose

Since energy and mass cannot be created the increase in mass of the object must come from the black hole with a corresponding reduction in the mass of the black hole.

You need to understand the nature of potential energy and the way it is accounted for - you gain potential energy up to a maximum of zero as you move an object away from a gravity source. Also energy conservation in GR is complex

If there are several objects being pulled towards the black hole gravity must transfer mass to all the objects and at some point the reduction of mass will cause it not to be a black hole. At that point does the singularity expand back to the size of a smaller neutron star and the black hole cease to exist? If gravity transfers mass to other objects wouldn't this also occur before the sun collapses into a black hole and prevent the formation of the black hole?

Just not the case

The relationship between gravity and energy is contradictory. If you fire a bullet into the air does its mass increase to account for potential energy or decrease because its velocity is decreasing?

There are no black holes, E<>mc^2, and there is no force of gravity.

You really need to understand the physics and the maths of the situation before you trash 100 years of science - especially when that science conforms with every experimental piece of evidence so far gathered. That said GR at a blackhole is difficult Penrose and Hawking showed that the equations will demand a singularity in any black hole and at similar events at the beginning of the universe - but for this reason amongst others we tend to believe that GR fails to be valid at the lengths and energies involved and we need a theory of quantum gravity