very hot
You would die quickly, either before, or after, falling into the black hole, depending on the mass of the black hole.
If you jumped into a black hole, you would be stretched into human spaghetti.
If a star was "too close" to a black hole, that star would be captured by the black hole's gravity and be pulled into it.
The black hole's mass would increase by an insignificant amount.
It would get completely destroyed. the mass of the black hole would increase.
No, they are not the same. A singularity would be inside a black hole.
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.
Nothing, not even light, can escape a black hole. So Earth would get caught into the black hole's path and we would be sucked up and crushed to oblivion
If the Sun collapsed into a black hole, it would be about 3 kilometers in diameter.
You would have a black hole the size of the combined mass of the two black holes.
No. Earth would be destroyed if a black hole came anywhere close to it.
You cannot see a black hole when you are on Earth, unless a black hole were to absorb Earth, which even then, you would see it in a split-second before it would engulf you