We would die because the temperatures would be to hot for life to take place.
earth would no longer exist
Nothing, The earth would be sucked up before it even got near to the earth.
Earth gets hit every day by gamma-ray bursts - from far, far away. Depending on how near the gamma-ray burst is, it may cause some serious damage.
there is no possible way to flood the ocean but if you mean if the ocean started to flood the earth then the results could be catastrophic.
Well a lot of things might happen like: If it was further every thing would freeze And if it was near the sun every thing would burn Either way WE WOULD DIE
near the plate boundaries
Black Holes are nowhere near earth, but if we do get close enough it will first rip us apart or if it's gravatational pull isn't that much then we would just get crushed?
A supernova is an exploding star. The Earth would be instantly incinerated, of course. There is approximately zero chance this will ever happen, though. If there was a supernova near Earth ... it would depend on how near. Betelgeuse is a good candidate for a supernova "soon" (within the next million years or so). Scientists who have modeled supernova explosions don't expect it will have much of an impact. If a star nearer than Betelgeuse were to go supernova, then it might be more serious.
well if a quasar were pointed at earth for only ten seconds it would decimate our ozone layer causing a disruption in the food chain, food shortages, starvation, and mass extinction.
It would be warmer than if it were not.
It's impossible to say exactly what would happen. Many scientists have predicted what may happen, but it's not set in stone. Don't forget that the Earth's would take hundreds, if not thousands, of years to completely change its tilt like this. The obvious change would be that seasons would be changed dramatically, as the Earth would heat more unevenly. Many areas would experience the same extended periods of day or night that are now experienced only near Earth's poles.
The neutral object will probably get an induced polarity.