I Need Help With My Assignment?

Don’t worry, although I am slacker, I’m not asking anyone to do it for me. I’m already finished with it, I just need someone to read it over and make sure everything is correct. Also, I’m aware there are spelling errors, I’ll correct them later.
Q. Under what condition will you and a friend share the same realm of spacetime?
A. Two people share the same realm of spacetime if they share the same reference frame.
Q. Time is required for light to travel along a path from one point to another. If this path is seen to be longer because of motion, what happens to the time it takes for light to travel this longer path?
A. The time it takes to travel the longer path legthens.
Q. If we see somebody’s clock running slow due to relative motion, will they see our clocks running slow also? Or will they see our clocks running fast? Explain.
A. Both clocks will be seen as running slow because the measurements of one realm of spacetime need not agree with one another.
Q. If you were traveling in a high speed rocket ship, would meter sticks on board appear to you to be contracted? Defend your answer.
A. No. It only appears contracted outside of its relative time frame.
Q. If you were in a smooth-riding train with no windows, could you sense the difference between uniform motion and rest? Between accelerated motion and rest? Explain how you could do this with a bowl filled with water.
A. There would be no noticeable difference between uniform motion and rest. There would be a noticeable difference between accelerated motion and rest. In a bowl filled with water, it would remain even at rest and in uniform motion, but would tilt towards the back under accelerated motion.
Q. Can an electron beam sweep across the face of a cathode ray tube at a speed greater than the speed of light?
A. Yes, though the actual electrons will be moving at a speed slower than the speed of light. (I wonder if this concept has anything to do with why particles are appearing to move faster than the speed of light in the Hadron-collider experiments…)
Q. Could a human being who has a life expectancy of 70 years possibly make a round trip journey to a part of the universe thousands of light-years distant? Explain.
A. Yes, but only if the vehicle uesd is capable of reaching near light speeds. The closer one gets to moving at the speed of light, the slower the passage of time for that person.
Q. Exactly what is equivalent in the principle of equivalence?
A. Observations in an accelerated frame are equivalent to those made in a Newtonian gravitational field.
Q. Which runs faster, a clock at the top of the Sears tower in Chicago or a clock on the shore of lake Michigan.
A. A clock at the top of the Sears tower runs faster. The closer one gets to the centrifugal gravitational force of the Earth, the slower the passage of time, though the difference is only a few millionths of a second per decade.
Q. An astronatu awakes in her closed capsule, which actually sits on the moon. Can she tell whether her weight is the result of gravitation or accelerated motion? Explain.
A. She cannot tell since both appear equivalent to each other.
Q. An astronaut is provided “gravity” when the ship’s engines are activated to accelerate the ship. This requires the use of fuel. Is there a way to accelerate and provide “gravity” without the sustained use of fuel?
A. Yes. A rotating spacehip can create the centrifugal force necessary to simulate gravity. Fuel will only be needed to start the rotation, it can then be turned off as its own momentum will keep it rotating perpetually in the frictionless vacuum.
Q. Why will the gravitational field intensity increase on the surface of a shrinking star?
A. It would increase as the gravitaional field strengthens from its closer proximity to the center.
Q. How can we “observe” a black hole if neither matter nor radiation can escape from it?
A. We can “observe” black holes by its gravitational effects on other objects.
Q. Why does Einstein’s theory of relativity imply that gravity is a non-existent force?
A. The theory implies that gravity is a non-existent force that people have invented because we are unable to percieve the curvature of space-time caused by massive objects.
Q. Suppose an astronaut falling towards a black hole used a watch to check her pulse rate. She notes that her pulse rate remains constant as she falls toward the black hole. (Obviously this astronaut is though.) Why, if clocks run more slowly in strongly curved regions of space-time, does the astronaut find that her pulse rate doesn’t change?
A. The pulse rate would only appear slower to an observer outside of the Astronaut’s frame of reference.
Now we get in to more celestial object related questions in this link below, I couldn’t fit everything into my question, so I uploaded the rest in t