Gravity never zero

Discussion in 'Astronomy, Exobiology, & Cosmology' started by Ivan, Dec 18, 2011.

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  1. hansda Valued Senior Member

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    This is the case of before BBang ; when there was only energy and no mass .

    For other case where mass is zero ; massless particles can be considered .


    Its true without energy , there cannot be any gravity . But mere energy can not cause gravity ; some masses has to be there .


     
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  3. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    Nothing to do with your argument.

    For what?

    Wrong.
    As explained.

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    Another fail.
     
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  5. hansda Valued Senior Member

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    Do you mean to say , there was gravity before Big Bang ?
     
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  7. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    Why do you not read?

    Me. Post #90.
    Which a different question altogether from energy causing gravity.
     
  8. hansda Valued Senior Member

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    What i mentioned , in my earlier post #87 : in the extreme case when mass is zero , gravity can become zero .

    Pre BB is one such extreme case .

    Another case of mass being zero is massless particle .

    Between two massed particles , there is gravity ; but there is no gravity between two massless particles .
     
  9. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    Um, false.
    What you actually said was:
    If there is a mass to be converted then it's obviously NOT pre-BB.

    And you're still ignoring the fact that with sufficient energy and no mass there will be gravity.

    Another fail.
     
  10. Robittybob1 Banned Banned

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    GR the R is for Relativity! I've closed the page on Einstein sorry.

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    But the speed of gravity could have a factor in it. It was hard to find a simple answer. (Still looking)

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  11. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    Oh dear...
    Because you're a crank?

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  12. wellwisher Banned Banned

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    If we started the universe with only energy, that means the only reference that would exist would be a speed of light reference. Matter on the other hand, will require this C reference, drop below C since matter cannot exist at C. We need a reference slow down from C to <C to be able to condense energy into matter.

    The problem that I often see, is we try to use the earth reference to explain the BB, even though this reference did not exist at the BB. There is imaginary factor when we use this after the fact looking glass. I try to stick with only references that could have been available at the BB, such as C and C-.

    Since gravity is associated with space-time via GR, to approach zero gravity, you would also need space-time to be completely expanded all the way to a theoretical zero reference.
     
  13. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    Why do persist in posting absolute bollocks?
    Is it some uncontrollable compulsion you have, or do you consider it to be "clever" or "funny"?
     
  14. Robittybob1 Banned Banned

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    You need reporting. You did not need to call me a crank.
    We were discussing your oddball science. It is you who should be finding the references not me. I had some sleep and closed the Google search on Einstein and GR WRT Mercury and you call me a "crank". That is unfair and unjustified.

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  15. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    Really?
    You don't think someone who claims to have "closed the page on Einstein" is to be taken seriously?

    Um, no. It's not "oddball" at all.

    You mean, for example you missed this:
    http://en.wikipedia.org/wiki/Tests_of_general_relativity#Perihelion_precession_of_Mercury
    or this:
    http://farside.ph.utexas.edu/teaching/336k/Newton/node116.html

    or any of the others available?
     
  16. Robittybob1 Banned Banned

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    "You don't think someone who claims to have "closed the page on Einstein" is to be taken seriously?" When you put it like that! I simply meant I was reading a study on the history of Einstein and I had closed it down before going to bed. I'm not going to look for it again.

    It was your "Energy density creates gravity" that we were trying to resolve.
     
  17. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    Like I said: your education is lacking.

    One more time: not "mine". Einstein's.
     
  18. Robittybob1 Banned Banned

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    Insulted again this morning. When is it going to stop?
    I wanted you to specifically show me the words that Einstein used to justify you passing your bad science off as belonging to Einstein.
    It is more that just giving me headings. I want you to quote me an actual sentence.

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  19. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    FFS!
    E=mc[sup]2[/sup].
    My bad science?
    It's "bad" because...?

    http://www.physicsforums.com/showthread.php?t=304975
    for example.
     
  20. Robittybob1 Banned Banned

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    Energy can be converted into mass as per that equation but that does not explain the how or where.
    So that takes us back full circle. Was there gravity in the beginning of the BB?
     
  21. AlexG Like nailing Jello to a tree Valued Senior Member

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    Here Robittybob1, read this, if you can.


    Relativity, chapter 15:
    http://www.bartleby.com/173/15.html

    I know you just want something short and simple so you can understand it, but you actually have to read chapter 15 in conjunction with chapter 23.
     
  22. Dywyddyr Penguinaciously duckalicious. Valued Senior Member

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    What?

    One more time: FFS!
    http://www.sciforums.com/showpost.php?p=2882277&postcount=90
     
  23. Robittybob1 Banned Banned

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    I'll give it a go. Read a bit of it and I had questions. I need a personal scientist teacher right in the room with me.

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    I'm wondering where to start on it? I can't start too in depth.
     
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