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I got some questions, me

  1. May 8, 2003 #1
    I got some questions, plz 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 plz 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 space craft 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?
    Last edited by a moderator: May 8, 2003
  2. jcsd
  3. May 10, 2003 #2


    User Avatar
    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 wierd 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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