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Given that space is expanding at present and maybe contracting at some time in the future is it possible it is elastic?
Pretty weak answer PmbPhy ...
...is a lot of activity on physics forums regarding this question:).
Doesn't Einstein postulate that space is elastic.
I.E. a particle moving into an area of space displaces that space space which springs back when the particle moves on?
Quote from: mxplxxxPretty weak answer PmbPhy ...If this is the way that you respond to people trying to help (i.e. by being so rude) when you disagree with the response you get (due to your ignorance of the subject matter) then why on Earth would I want to try helping you again?The fact is that people like yourself are merely trying to find people to agree with your flawed grasp of the subject. If you actually have a real desire to know the truth about it then you'd contact a well known expert in the field such as my friend Dr. Oyvind GrønSee: http://www.mn.uio.no/fysikk/personer/vit/ogron/ From that website you can get his e-mail address and write to him. In the mean time you can see part of his body of work by looking up the textbooks he's written or go to the American Journal of Physics website and search for his papers. This will demonstrate that he's an expert in the field. You can also write to other relativists. I'm a relativist who disagrees with the nonsense you just posted but since I disagree with you you chose to be rude. Take my advice and don't be rude to the other relativists that you e-mail, should you take up my challenge. I'm curious - Can you think of any reason why you wouldn't contact an expert in e-mail? I hope you don't refrain from doing so by assuming that such people are selfish and as such choose not to help others who contact them?Quote from: mxplxxx...is a lot of activity on physics forums regarding this question:).Lol!! So what? The fact of the matter is that almost all members of such discussion forums have absolutely no idea what they're talking about when it comes to this subject whereas I have a very solid understanding as reflected by my interactions and discussions with experts in the top of these fields.Quote from: mxplxxx Doesn't Einstein postulate that space is elastic. No. Absolutely not.Quote from: mxplxxxI.E. a particle moving into an area of space displaces that space space which springs back when the particle moves on?That statement makes no sense as worded. Are you claiming that space is "displaced" because a particle moves into it and "springs back" when it moves out of it?? What utter nonsense. First of all there is no meaning to what you refer to as space being displaced. And the term "particle" is used to refer to objects whose mass is so small that it doesn't affect the curvature of spacetime. And space doesn't "displace" (especially since that term is undefined in relativity). Matter "curves spacetime". Lookup what that means. Since you were so rude in your response don't expect any help from me in the future or to read anything you post again.
Given that space is expanding at present and maybe contracting at some time in the future...
is it possible (space) is elastic?
If you compress spacetime the energy required is proportional to the compression magnitude.
Quote from: NilakIf you compress spacetime the energy required is proportional to the compression magnitude.Please describe how you do this.Also how you apply the energy and measure the energy involved.
Of course if you stretch something, something must do the stretching. This could be achieved in the case of space by photons which end up at the edge of the universe. Space doesn't necessarily have to follow Hooke's Law because it is not a material.
Isn't there a variant of "Godwin's Law" operating here, ie - the longer the discussion goes on, someone will eventually mention "Dark Energy"