Recent content by JabberWalkie

  1. J

    C60 Triple Point?

    Well, I found this article(letter) in nature: http://www.nature.com/nature/journal/v365/n6445/abs/365425a0.html Which is a theoretical calculation to check if it has a liquid phase. They guess that it does not.
  2. J

    Lorentz-invariant electric charge?

    There is no proof people. To the people that keep using the 4-current to show charge invariance, you need to assume that rho*c transforms as a time component to get charge invariance and a working definition of 4-current. This is from the angle where you start with the classical form of...
  3. J

    How much do postdocs get paid?

    Check out this link from AIP: Figure 2 http://www.aip.org/statistics/trends/highlite/emp3/emphigh.pdf the median seems to be around 40k a year.
  4. J

    Schools Can I get into grad School?

    Well, I was thinking about buying some graduate level QM and E&M texts and studying in the meantime. To be sure, I have gotten rusty. Some recommendations along these lines would be appreciated. Thanks. -JabberWalkie
  5. J

    Schools Can I get into grad School?

    Hello all. I am wondering what my chances are of getting into grad school. I realize there are other posts on the topic, but everyone is in a different situation so I think this is warranted. I have what the university calls a combined honors mathematics and physics BSc degree from the...
  6. J

    What does an engineer really do?

    Ok, thanks to everyone for their replies. They were all very helpful. :smile:
  7. J

    What does an engineer really do?

    Ok, so I am wondering what an engineer really does on the job. How much of it is actual engineering, how much of it is paperwork, meetings, talking with clients, or whatever? I would appreciate it if only people that are working in engineering respond. Thanks.
  8. J

    Doping away From half filling

    So, I'm refering specifically to the phase diagram of Superconducting cuprates. For example like the one here: http://www.kitp.ucsb.edu/activities/qpt05/blog/8/blog8_files/phase.jpg I'm not sure how exactly "hole doping" is defined
  9. J

    Doping away From half filling

    Can someone tell me what Doping away from half Filling means? I see it everywhere. Although I can't find referance to it in Kittel or Mermin, although I might not be looking hard enough. I have and idea of what it is. Half filling refers to the doping where the Brillouin Zone is half holes and...
  10. J

    Strange Ice cube behavior

    Nice... Thanks guys!...i knew it couldn't just be water dripping from the roof.....had a hunch that there was some cool physics going on here. Thanks guys!
  11. J

    Strange Ice cube behavior

    I don't see how, its a freezer...every thing is frozen, so nothing drips from above. Also, its not formed vertically, it is at an angle to the normal.
  12. J

    Strange Ice cube behavior

    So, i've noticed that when I freeze ice cubes these strange icicles appear on the top of the ice. I took a picture, included as an attachment. Not really sure how something like this forms. Please no speculation.
  13. J

    Transformation to a local inertial Frame

    Thanks for the help, i was able to find a transformation that made the metric locally minkowski, and everything just fell out from there! Thanks!
  14. J

    Transformation to a local inertial Frame

    So, i really havn't done anything with one forms....ive looked them up, but they dont really make any sence. Im not sure how this helps :cry:Is there a way to do this without 1 forms?....we havn't been taught those in class......so there should be a way to do the problem without that....
  15. J

    Transformation to a local inertial Frame

    So ive been working on this problem. Im given the metric in Kruskal coordinates, so ds^2=32M^2exp(-r/2M)/r(-dT^2+dX^2)+r^2(dθ^2+sin^2(θ)dΦ^2) And the path of a particle is X=0 T=λ θ=π/2 Φ=0 And the path of the observer is X=-1/2*T+1/2 θ=π/2 Φ=0 And im asked to find the 3...
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