how many things can fit in a blackhole at one time?
479801
Theoretically, this depends on its initial mass and the rate that it is 'eating', i.e. the rate that mass flows past the event horizon.  A black hole emits radiation at an\namount proportional to its surface area, but the amount that can be eaten depends upon the local spacetime geometry around it, which is affected by the mass distribution (stars, dust clouds, etc) around it.
41420
This is like asking what is a box composed of that you just stuffed with items...Well whatever you put in it.\n\nWhatever the black hole has "consumed" over the course of its lifetime would be what it is made of.  It is what it eats.  The question is does the black hole change the nature of that material.  Probably, but who knows?
724210
something like what we call a "black hole"
585565
Spectroscopy (splitting the light into its constituent colors) and photometry (counting up how much light there is).  We can measure how far away they are via redshift, and from that and brightness measurements calculate their absolute luminosity (how much energy it puts out per second). The size of the emitting area can have an upper limit placed on it by watching how fast it varies in brightness.  (Approximately the speed of light over the brightness change timescale).  \n\nSo, you are emitting "x" amount of energy in a volume of "y" size.  The number of stars necessary to produce that sort of energy collectively would have a mass large enough that this superdense cluster would be inside of its own Schwarzschild radius (ie be a black hole).  \n\nSo you need some more efficient way to produce energy than fusion in stars.  The only astrophysical phenomenon known to do that is the rapid loss of a large fraction of  gravitational potential of mass (drop something onto something dense enough that it would reach an appreciable fraction of the speed of light. As it interacts with other matter on the way in, it heats up and glows.)  This requires either black hole or neutron star type gravity.\n\nI suppose you could hypothesize a dense cluster of a zillion neutron stars all accreting matter, but that is pretty contrived compared to a single large blackhole.  You can probably show that their accretion disks would result in enough drag as they zipped around one another (and consequently through one another's accretion disks) in this small volume that they would all be coalescing and collapsing into blackholes in a pretty short timescale anyway.\n\nIn short, nothing so small and so bright could be anything BUT an accreting supermassive blackhole.
918848
According to general relativity, the matter inside a black hole collapses to a single point: a "singularity".  At this point, the mass density (ρ = m/V) is undefined (because the volume of a single point is zero). \nWe have a lot to learn about extreme cases such as this.
644281
we really don't know how many stars are in the sky. new ones are found every day and others blow up. so i guess the number in infinite.\n\nas for the black hole, somewhere in our galaxy and in other places too.
834717
It depends what you mean by small and volume.\n\nIf by small you mean mass, then for a black hole to form spontaneously by gravitational collapse it requires a minimum of around 6 solar masses (6 times the mass of our sun). In principle you could forcibly compress matter to form a smaller black hole, but in practice it is not clear how - or whether - you could do this.\n\nVolume is more complex. If you mean the volume contained by the Schwarzchild radius (or event horizon) then this can be very large indeed - many times the volume of our solar system for the black hole belived to be at the centre of the galaxy. \n\nIf you mean the volume of the collapsed matter, then this is zero, because a black hole is a singularity.
115980
You need, in theory, two black holes at two points in spacetime to curve space so much that the two ends actually connect. These ends can be connected over space or over time so you can imagine using such a wormhole to timetravel or get really far really fast, if you're not destroyed by the black holes.
1009323
I figure that a theory that predicts 6-7 extra dimentions may be true, but it is really easy to explain things with 9-10 degrees of freedom..\n\nTHink about it, you have data... you try to make a linear fit, most often you don't get a good correlation... Now try a 4th power polynomial fit... you get something better... 11th power can describe any data, but it makes no really valid predictions. \n\nAs Einstein said, "Any fool can make things bigger and more complicated" (don't remember exact words so this is paraphrasing) "but to explain things in simple manner truly takes a genius"\n\nBut there are things about it that are likely true, for instance the "strings" themselves... Yes, everything is made of a fundamental unit of energy (double slit experiment demonstrated that matter is localized energy) \n\nLast point: to have a valid theory it should predict measurable results, string theory does not.\n\nSo no, I doubt its tue, but only time will tell.
242225
As many as you can fit in!
232928
More space: you loop through two black-holes and a wormhole and end up where you began, only you get there a few minutes before you left.
1158151
you're thinking of a worm hole. a black hole will, as far as we know tear things apart to as it takes them to a different part of our universe, which doesnt make sense because nothing can escape from them. Anyway, a worm hole, which is theoretical -mostly- is like two black holes connected at their vertex's. think of the universe as a thin sheet of paper. one black hole is is on the right side, and another on the left. fold the piece of paper so that the black holes are lines up. instead of traveling from point A to point B, you just go through space in manner of speaking from point A to point B "just like that". there really isnt any just like that, but that's as best i can describe it with out actually showing you. sorry if this makes no sense.
365615
Have mass and occupies space
471213
It all dependend where you are filling time. In an insane intitution there are people who experience 4 ,5 of more dimentions . so far I have heard of 26 dimensions being filled including many dimentions of time.\nSpace and time have the same thing in common they can be filled both at the same instance!
1166146
Yes........more or less. A Black hole is a small view of what the universe as a whole will be like billions of years from now.
224610
unless this is a "zen" question, it doesn't "go" anywhere.  A black hole is a former star that has died and collapsed in upon itself and had its mass "infinitely" compressed into a tiny tiny volume.
1142505
The singularity itself has zero size. But the conventional "measurement" of a black hole is its "Schwarzchild radius", which is the distance from the singularity at which the escape velocity is equal to the speed of light. Once anything (even light!) falls within the Schwarzchild radius, it cannot escape. The size of the Schwarzchild radius depends on the mass of the black hole.