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| bio | website | |
|---|---|---|
| location | The Matrix | |
| age | ||
| visits | member for | 11 months |
| seen | yesterday | |
| stats | profile views | 148 |
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Jun 8 |
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Can a rock be considered frozen Note: the phase diagrams of He3 and He4 are quite different. |
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Jun 4 |
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Einstein-de Sitter - confusing constant of integration I suppose so. It just depends on how you prefer to think about it. |
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Jun 3 |
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Einstein-de Sitter - confusing constant of integration See my edit.... |
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Jun 3 |
revised |
Einstein-de Sitter - confusing constant of integration added 779 characters in body |
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Jun 3 |
answered | Einstein-de Sitter - confusing constant of integration |
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May 27 |
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In what order should unit symbols appear? @BenCrowell IMO, I prefer space rather than dots but yeah, good point, leaving definitely one of those is needed. I should have done this in my question but I'll leave it. I'm not used to typing units, I normally do numerical calculations by hand. |
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May 27 |
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In what order should unit symbols appear? @SteveMoser Well, as with most things in life, you're probably going to have to find some compromise. Either make some fancy code, or get a simple algorithm and hope for the best. My answer is what 'what humans want', not 'what computers want', I'm afraid. Either way, best of luck - hope it works out! |
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May 27 |
answered | In what order should unit symbols appear? |
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May 23 |
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Is the meander ratio of a river $= \pi$? Nice question! It looks like some kind of least action: eps.berkeley.edu/people/lunaleopold/… en.wikipedia.org/wiki/Meander#Derived_quantities |
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May 22 |
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How do we know Dark Matter isn't simply Neutrinos? Yeah, it'd be a pretty weird Universe otherwise |
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May 19 |
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Criticism of String Theory by other string theorists @twistor59 he/she has been a member for only a few days, so, unlikely |
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May 19 |
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How do we know Dark Matter isn't simply Neutrinos? Also, I believe that $\nu$ oscillations only 'prove' a mass difference, not a mass for all three species. But, that's being a bit pedantic, sorry. |
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May 19 |
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How do we know Dark Matter isn't simply Neutrinos? I was referring to the top-down structure formation (from blinis) that would occur if $\nu$s were HDM, as opposed to the bottom-up formation from CDM that results in the structures we see. It's not new, but they are well and truly ruled-out, unless $\nu$ are like 10 eV and we don't know anything :D |
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May 19 |
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Derivation of Dirac equation using the Lagrangian density for Dirac field Yeah, it's like a 2-line derivation |
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May 18 |
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How do we know Dark Matter isn't simply Neutrinos? Neutrino HDM is ruled out by large-scale structure observations. |
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May 14 |
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How do forces work Why do you ask that fields are ignored? That's the way it is - deal with it |
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May 14 |
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Is there anything physically infinite? @YvanVelenik Yes, my last comment said exactly that. To discuss further, we'd have to stray into the philosophy of science... and let's not. |
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May 13 |
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Is there anything physically infinite? @michielm That's ridiculous. Any answer from 'philosophy' wouldn't even come close to satisfactory. |
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May 13 |
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Is there anything physically infinite? @Val To your first comment: Yes, it's a physical theory. Clearly, it would not be useful, or even testable. I'm not saying the concept of infinity is a physical one, just that I can't see a reason why it couldn't be physical. To your second comment: that is in no way a proof. |
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May 13 |
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Is there anything physically infinite? @YvanVelenik Why is it not a scientific statement to say "there is no physical law that we know of that would prevent a photon from travelling infinitely far"? |
