I got some questions, me

  • Thread starter eastsidecrew
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I got some questions, please help me

hi i did my indipendent study report on time travel and i have to give that report to every students and each of them will ask me 5 qestions and i have to answer them. here are some questions they gave me please help me out. I need to find answers as soon as possible. I tried to search, but i couldn't find it.

1) Is it possible to calculate the magnitude of the gravitational field of a black hole?
2) How in a wormhole do two regions of space actually come together??
3) Is it possible that anything could attach it self to a cosmic string?
4) If time travel was possible, would it be ethical to use that power for any means?
5) Since light is a form of energy and has no dimensions of time, wouldn’t time traveler age normally in a spacecraft that went light speed because time puritans (pertains) to him?
6) If wormholes are so unstable that they would collapse when light entered into them, would not there be no wormholes in the center of black holes because light can enter black holes?
7) How is it that black hole’s powerful energy is responsible for the creation of a wormhole?
8) How does a rotating black holes different from a normal one and why cannot a normal black hole be used for time travel?
9) You mentioned that a wormhole can deflect light rays, but how does this help in time travel?
10) If a cosmic string has enormous amount of gravitational pull, would not any object near it just suck in it and be destroyed? If not, how a combination of a cosmic string and a black hole simply shrink the space time?
11) How does one attach a cosmic string to an object?
12) Could you explain in more depth the idea of parallel universes?
13) If there is no dimension of time at light speed, would we become frozen if traveling at this speed?
14) Why does a black hole have high levels of gravitational force?
15) What is meant when you say that wormholes are unstable?
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Answers and Replies

  • #2
Science Advisor
Greetings eastsidecrew !

Welcome to PF !

1. Yes.
2. I have no idea and I do not
believe anybody else really does.
3. Super String Theory is not
an accepted theory yet. Anyway, I think
it discribes everything in terms of strings -
so there's no "something" to speak of.
4. I don't know, I don't have the
"ethics" formula. :wink:
5. Nothing with rest mass can reach c. Like
you said light has no time dimension and
hence doesn't move through time at all.
6. Wormholes are the stuff of sci-fi for now.
7. Like 6. Except that in "theory" a
wormhole happens when the collapsed (through
the fabric of space-time) singularities
in the center of two BHs meet and connect.
8. A rotating BH rotates. :wink: BHs do not
allow time travel in the "sci-fi conventional"
meaning of that word combination.
9. Like 6.
10. Total sci-fi.
11. Like 3.
12. There's a number of such theories.
One theory for example speaks of the Big Bang
and says that since the Inflation was so
fast (much faster than c), many totally
separate Universes were created.
Another possibility concerns Quantum Mechanics.
It is theorized that each particle exists
in an infinite amount of parallel Universes
and when the particle interacts (an event)
there are infinite amounts of possibilities
"spread" according to the statistical
predictions of QM.
There are other weird possibilities too.
13. Like 5.
14. The gravitational force of a BH is
directly proportional to it's mass according
to Newton's Universal Law of Gravity:
F = G * M1 * M2 / R^2
A BH with the mass of a star has the same
gravitational force at the same distance
from it. However, the mass of the BH occupies
an extremely small area of space, so
you can experience a strong gravitational
force a short distance from the BH while
in the case of a star - you'd be deep
inside it at such a distance.
15. Like 6.

Live long and prosper.

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