None at all.
Black holes do exist. They have been observed.
There is no evidence that white holes exist.
No, a black hole contains a lot of matter and thus has a huge gravitational pull. Absolute vacuum doesn't exist anywhere we know of.
It is not known whether there actually are white holes, or whether they might exist - and if they do, exactly what properties they would have. White holes are a possible solution to the equations of Relativity, but that doesn't mean they actually exist. The problem is that they are in a way the reverse of a black hole - nothing can get OUT OF a black hole, and nothing can get INTO white hole. As a result, it seems to be impossible to destroy a black hole... But similarly, it would also be impossible to create a while hole.
yes, if you are sucked into one you do not exist anymmore.
No one is 100 % sure that Black Holes really exist. Mathematics tell us that they should exist, but it has not been proved yet. Most physicists believe they do exist in our universe. We could have Black Holes that may be a billion times larger than our Sun.
No. Nobody invented black holes; they occur naturally. However, Einstein's theory of relativity suggested the possibility that black holes could exist. Karl Schwarzschild was the first to explore these implications.
yes. but the intense gravity is so strong it seems to bend time so slowly some people believe that there is no time in a black hole I WOULD JUST LIKE TO POINT OUT that time does exist in a black hole it is just extremely slow on another note if time did not exist in a black hole then a black hole would not suck things into it. so time does exist in a black hole.
Yes. Intermediate-mass blackhole is a medium size black hole. Scientists have found stellar black holes and supermassive black holes but there is no prove that Intermediate-mass black type of black holes exist. My opinion is that they do exist because when a black hole is becoming a black hole supermassiveblack hole it will need to go though this stage of intermediate-mass black hole.
A vacuum and a black hole are two very different things.
We know nothing about the conditions within a black hole, but it seems unlikely that a black hole could exist within a black hole, or even if this concept would have any meaning at all.
There is no evidence that white holes exist.
Since whit holes only exist mathematically, a black hole could not pull in a white hole.
No, a black hole contains a lot of matter and thus has a huge gravitational pull. Absolute vacuum doesn't exist anywhere we know of.
Black holes, or singularties, apparently exist in different sizes.
There won't be a world. The sun is a star. When a star dies it implodes and creates a black hole, sucking everything nearby into it, which will be destroyed forever. if the sun goes out, Earth won't exist because we'll be sucked into the sun's black hole.
No non-fictional astronomical body know as black circle. If the question is meant to employ the term 'black hole' in space, what a black hole does is to exist.
black holes The black hole we see is the Event Horizon. Its realy not a hole. Just a spherical region in space where matter ceases to exist.