Right. Maybe I'm just confused, or wording this incorrect.
Speed of light is constant, but an observer's relative point of view may apparently distort it. Ex. Light is traveling along *la ta da* but a person who is affected by some strange gravitational force or otherwise, it observing it much...
The answer is C, by reasoning. I didn't do any math, and I haven't taken intro-physics yet, but my reasoning is this:
The speed will stay constant, unless altered by another force, which neglecting air resitance, speed is constant.
So when the rock hits the ground, it will be a the same speed...
If my understanding is correct, which it may not be, wouldn't super-massive black holes be attracted to one another? So although a thermal equilibrium may be reached, the gravitational force of the black wholes would draw them all together? Leading to another possible big bang?
I mean, space...
Well, it may be hard to say. I am a junior in high school, so my physics knowledge is limited, however, I am fond of
i^2 = -1
Imaginary x Imaginary = Real. Seems silly but awesome.
Hayley