protovack said:
What is it that Quantum theories give us that GR does not?
A basic description would be that GR says "On a big scale everything is smooth" and QM says "On a small scale everything is bumpy". Hence when you try to describe small things with GR you get problems, but a black hole is so massive you must use GR at least in part. QM is about probabilities, uncertainties and individual particles, GR generally looks at a lot of things from a distance and gives general behaviour.
The most extreme situations in physics are black holes, loads of mass and energy, but confined to a space comparable in size to an atom. Which do you use, GR or QM? You've got to use both, but they aren't completely compatible with one another, here in lies the problem. For the last 30 years developlment on a combined replacement has been worked on, out of which String Theory and M-Theory have appeared and all the talk of 11 dimensions.
protovack said:
Also, what GR force is it that creates a black hole? Does the gravitational force initially create it? Is there a point at which the forces holding all the matter together are stronger than the "strong nuclear" force?
Would this mean that the barriers between the nucleuses of atoms break down? Are there still protons, neutrons, and electrons inside of a black hole? Or do melt together or something?
There is a principle called The Pauli Exclusion Principle. It says (in more exact and technical terms) that 2 fermions (electrons, protons and neutrons are fermions, gravitons and photons are not) cannot be in the same place/energy state at the same time. This is what holds neutron stars up, the neutrons
normally cannot combine into one energy state or point in space. Neutron stars form when a large enough star dies, cools and gravity is strong enough to create such a high pressure it crushes the electrons into the nucleus.
For a sufficently massive object the crushing force of gravity can actually over power the natural "Fermi Degeneracy Pressure" which keeps even the neutrons apart, and crush them together. It's too late in the evening for me to get my cosmology lecture notes and type them out here, but suffice to say, enough gravity will make it happen. At this point the neutrons are crushed into a single point (from the view of GR), creating an object with infinite density and with sufficent gravitational force to prevent light from escaping, which is called a black hole.
compact said:
Yes, this thread is vitriolic enough that I understand your unwillingness to participate here, but you've had plenty of chances to join in discussion in the past.
We tried being vaguely polite, and I was honest but polite in my first PM reply to David but patience is not something I am blessed with when dealing with stubborn people whose logic resembles swiss cheese, so my tone turned to being more acidic sarcasm, and will remain so whenever David decides to stick his neck out and say "Its all wrong, my theory is right, but I'll be damned if I'll tell anyone" in a thread in future.
He can either stop what is effectively trolling or I call him on his lack of understanding and unwillingness to even answer the simplest of questions
every time he brings it up.