Is the Universal expansion caused by ''heat''?

Discussion in 'Physics & Math' started by Dylan, Oct 8, 2017.

  1. origin Trump is the best argument against a democracy. Valued Senior Member

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    You seem like a nice young fellow, but this getting very tedious. I suggest that you consult Wikipedia for your answers.
     
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  3. Dylan Banned Banned

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    I thank you kind sir for your patience and replies. The Wikipedia you mentioned seems very informative but it does not talk back to me to clarify the understanding of the information. I am sorry for being a pest sir, I am just curious and think you would have to be a scientist to understand Wikipedia.
    Thank you for your engagement this far.
     
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  5. exchemist Valued Senior Member

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    I've given you the links. You can quite easily read for yourself the passages in which the theory of the metric expansion of space is stated and described. In fact I actually quoted a passage from one link in post 9.

    Since up to this point it is us who has done the work of answering your questions and finding explanatory links for you, I suggest you now read the link I provided in post 13, and then you make a new post in which you quote the relevant passage from that link (the opening 2 sentences will do ), just to show that you have done some reading of your own. And then, if necessary we can take it further. Perhaps.
     
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  7. Dylan Banned Banned

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    Thank you kind sir, I did look at your links and read the links.

    ''The metric expansion of space is a key part of science's current understanding of the universe. Metric expansion of space, is whereby spacetime itself is described by a metric which changes over time in such a way that the spatial dimensions appear to grow or stretch as the universe gets older. It explains how the universe expands in the Big Bang model, a feature of our universe supported by all cosmological experiments, Astrophysics calculations, and measurements to date.''

    I am sorry kind sir , but nobody is showing me what space is made of that stretches.
     
  8. Michael 345 Valued Senior Member

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    Who has the impression there are no kind sirs here?

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  9. origin Trump is the best argument against a democracy. Valued Senior Member

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    Took a break and can now put up with your fake politeness for a few more posts.
    By the way kudos for your incessant use of 'kind sir', it really is rather annoying and as such is a quite good trolling technique!
    I'm afraid no one can help you there. That is like asking what is a quark made of? Science can say quarks have these properties but what it is 'made of' is not answerable or even particularly meaningful. Space has 4 dimensions and can be stretched and warped by gravity, what it is 'made of' is not answerable or particularly meaningful.
     
  10. exchemist Valued Senior Member

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    Ah well, that's not what you asked me for. This exercise has dealt with what you did ask me for, which was a statement showing that space itself is expanding (according to modern cosmology theory).

    As for what it is that stretches, it is the metric, i.e. the very dimensions of length, breadth and depth. If you know any special relativity, you will appreciate that observations of length are not absolute but depend on the motion of an object relative to the person or device measuring it. So the spatial dimensions of something can vary depending on the circumstances. In general relativity this rather disturbing idea is taken several steps further. Suffice it to say that it not necessary that space be "made of" something in order to get stretched.

    The link you have just quoted from gives a more thorough explanation. I suggest you read it and the other link and have a think about it. It is admittedly not an easy concept.
     
  11. Dylan Banned Banned

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    Thank you kind sir for your reply and answer. You are saying then that we think the space itself is stretching but there is seemingly nothing to stretch? I do not understand kind sir, that sounds like a contradiction to me.
     
  12. Dylan Banned Banned

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    Thank you kind sir for your reply and answer. A statement of words cannot create the action described with those words. The action has to be a physical process and then we describe the process with words. A change in metric measurement is a difference between two points. I am sorry sir I can not imagine how nothing can stretch. Can you please explain kind sir? It is ok to just say you do not know the answer.
     
  13. exchemist Valued Senior Member

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    Do you understand how special relativity shows that length changes with relative motion?
     
  14. Dylan Banned Banned

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    I am sorry kind sir, please forgive my ignorance, I have no idea of what you mean by length changes with relative motion.
     
  15. exchemist Valued Senior Member

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    In that case you need to start at square one with special relativity. I can help with that, but I'm not going to, as it will take far too long and there are plenty of places where you can read about it for yourself.

    Once you have got your head round that, you will be in a far better position to grasp an outline of general relativity and then how modern cosmology works.
     
  16. Michael 345 Valued Senior Member

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    I have a mental image of a 19 year old showing his mates how he can train adults as they roll around the floor pissing themselves

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  17. Dylan Banned Banned

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    Ok thank you kind sir for the advice , I will look up this special relativity you mention. Would you please kind sir then answer questions about it, if I do not understand?
     
  18. exchemist Valued Senior Member

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    Depends on the questions.
     
  19. origin Trump is the best argument against a democracy. Valued Senior Member

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    I said that space stretches - did you forget? You really seem to be confusing yourself.
    It is quite subtle and I did not expect you to be able to understand it. It is clear that you are here trying to learn (just kidding) but you clearly do not have the basic understanding of physics and you should try understanding the basics first before jumping into concepts that are beyond your understanding. A kid that wants to be a doctor does not start out with brain surgery, he starts with using Band-Aids.
     
  20. Michael 345 Valued Senior Member

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    Forgive me kind sir what is a BanAid

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  21. origin Trump is the best argument against a democracy. Valued Senior Member

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    It is an adhesive patch that goes over a cut my, impetuous young fellow. Band-Aid is 'merican talk
     
  22. Dylan Banned Banned

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    Thank you kind sir for your reply and considerable patience. I explained earlier I know very little science. The universe expanding was one of the first science things I viewed, so I consider that is my starting point and it does seem rather basic. If kind sir , you are saying space stretches, then my question as still not been answered . I asked what stretches? Space is a term and on google search it says :space is a continuous area or expanse which is free, available, or unoccupied.

    With great respect kind sir, you are saying to me : a continuous area or expanse which is free, available, or unoccupied stretches.

    I asked the question , what substance is stretching? As the word space is not a substance.

     
  23. exchemist Valued Senior Member

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    xyz.
     

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