1. According to Einstein, as something speeds up its mass increase, therefore the energy required to accelerate it increases, so when an object with any mass reaches light speed, its mass would be infinite, therefore the energy required to accelerate it would be infinite, so no, you couldn't. But there are theoretical particles called tachyons which always travel faster than the speed of light because they speed up as they lose energy, and therefore are always going faster than the speed of light, they are allowed in Einsteinian physics.
2. If it is structurally weak it would break apart, if it was strong enough it would stay togeather but squish a bit more, but an observer would most likely see it go very long even though it wasnt actually.
3. Black holes are too far apart, but if they were then yes, I imagine you would get binary black holes.
4. According to Stephan Hawking Black holes arn't so black, they emit Hawking radiation which would eventually evaporate a black hole, leaving nothing.
5. Yes, they do, the gas they take in adds to their total mass and also shoots out very strong electromagnetic waves like x-rays and gamma rays.
6. No one knows, it could have an infinite like shape...
7. The universe is the biggest object in the universe, but to be more specific, a large galaxy, or for a single object, i'd imagine a red supergiant or nebula
8.Well we have observed light that has been travelling for 13.7 billion years, so light can travel forever.
9. course there could, in 2009 we just named 6 new elements which were descovered recently
10. perhaps dark matter emits something of the sort and we can percieve it, but how would we know it was there if we cant detect it?
Age- 16 (so read a book, you might learn something!)