Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Newton, Einstein, multiply connected spacetime, Energy and so forth

  1. Mar 5, 2010 #1
    So, multiply connected spacetime may exist or even does already according
    to current knowledge, right? And in which of the thousand of millions of books
    about GR, which every physicist seems to have to have written about at
    least once, ever you read about it, authors claim that, although it's in general
    possible, it would practically take unobtainably vast amounts of energy to
    realize it.


    Well lets assume we somehow got to aquire such amounts of energy and a
    device which, in some magic concealed way, can create a wormhole for us.
    What would it be like? Practically, I mean.

    Wormholes, once created, must curve spacetime in a way similar to a BH,
    just stronger. And as a BH does have an enormous gravitational field and an
    event horizon, shouldn't each wormhole have one, too? Meaning, that once
    going into the wormhole, you are behind an event horizon you may never
    emerge from?

    I think I'm confusing a little classical theory, plus rubber- and paper&scissors
    model with GR, but let me go on nonetheless and correct me at the
    appropriate places.

    So far, I reckon that WH would create an enourmous distortion of spacetime
    which is as little spatially limited as a BH's one. But let's assume we created
    the WH in a way that the gravitational effect in its proximity is limited and
    there is no EH, so it's actually feasible for going through (I hope you can
    explain why this can be).

    Let's say we created such a WH down hear on the planet (huge machinery and
    stuff, needs a planet, you know...) and connected it to somewhere out in space
    in the 18th century. Here I got a little question, just out of curiousity and less
    relevant to my actual problem: Is the time a wormhole is connected to somehow
    correlated to the targeted position, or can both arbitrarily "chosen"?

    Back to the WH: We used an enormous amount of energy - possibly depleted all
    reserves of oil and other fossil fuels, just for the kick (wait, what...) - and now
    we got a stable wormhole. Do we have to keep pumping energy into it? Where
    will that energy go? Will we retrieve it back, once the wormhole is "brought down"?

    A black hole doesnt require much energy to bend spacetime. It just requires mass.
    It just sits there and laughs at us while we are squeezing the last iota of oil out
    of the ground, to keep our spacetime distortion alive. Or did we use mass to
    create it, too? If so, that would again make me wonder how our WH can
    effectively not be a BH in appearance an behaviour and not swallow the planet
    while it... worms.

    So our oil, where does it go? Does our machine which creates the wormhole heat
    up? Can it be built a way that it wont heat up and conserve the energy? Seriously,
    where is our energy, and how can we get it back?

    I got it! I know how we can get it back! Aw wait... That doesn't make any... But
    well, let me tell my proposal:

    Since we created a tunnel into space, far away from earth, we eventually have
    invented a working perpetuum mobile! Yes! It's so simple, every child would get it:
    Throw a stone in the black hole here on earth and see it falling from the sky (or
    have your ancestors, offspring respectively seeing it fall down).

    There we go! Everything balanced out. If you think about it, its a good
    investment, though. Invest an incredible amount of energy and get an infinte
    amount back. Problem solved.

    But how do we convince the government to fund our project, as they still
    believe in such stupid things as "energy conservation" (lol) ?
    Last edited: Mar 5, 2010
  2. jcsd
  3. Mar 5, 2010 #2
    Your concept of spacetime is flawed, and it makes you believe a wormhole is some kind of friendly portal.
  4. Mar 6, 2010 #3
    Thank you, friendly expert, for contributing so much to this topic.
  5. Mar 6, 2010 #4

    Vanadium 50

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2017 Award

    There is nothing of any scientific content here - it's all wild speculation.

    I encourage everyone to reread the PF Rules on overly speculative posts.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook