Recent content by xlines

  1. X

    The Stern-Gerlach experiment

    If you google "silver electron configuration", you'll get the answer that it is Kr 4d10 5s1. So, "Kr" tells you that silver electron configuration is like krypton's plus additional 11 electrons. Ten of them fill up 4d shell completely which does not have any angular momentum because there are 5...
  2. X

    Heat is just kinetic energy at a molecular level, right?

    Density does not matter. Relating macroscopical phenomena of thermodynamic equilibrium to atomic level events was subject to much research and is legitimate scientific question. Quick was to relate temperature and velocity of a particle is through equipartition - let say you have pointlike...
  3. X

    Principal Quantum number: n to infinity?

    Yes, actually there is no reason that I'm aware of for n to be limited above and, should that be true, expectation of the electron's distance from the nucleus rises without limits, with n2 I believe. Consequence is that with n = 1 000 000 you'd have hydrogen atom larger than Earth. Of course...
  4. X

    Why Does the Balmer Series Dominate the Solar Spectrum Over the Lyman Series?

    Hello! Similar question arose at another forum, basically guy asked what is the color of the hydrogen at the temperature T. I provided as much help as I could and he actually found solution which I think is correct. This said, I'm not sure that the numbers you got for the population of states...
  5. X

    Why does higher derivatives of displacement not concentrated?

    A very fuzzy question, because I'm not sure what are you suggesting. A few notes: We didn't stop. When you say it like that it seems like you are implying that Newton's law is result of a science community consensus to obey the Great Master, rather than meticulously verified principle of...
  6. X

    Is it possible that the Strong Force and gravity are the same thing?

    Hello! I've heard suggestions (e.g. Griffits in his "Introduction to Elementary Particles") that if singlet gluon could be photon itself then it would be beautiful unification of the electrodynamics with strong force, but have never actually heard of suggestion that it's connected to gravity...
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    Faster than light relative speeds (I know it's impossible)

    In essence - yes. Maybe this mental image will help you. Photon (quanta of light) and proton (a baryon, nucleus of hydrogen) are racing across the galaxy. Let's say that proton has so much energy and it's so fast that after 100 years of racing, it's only 1nm behind photon. Let us also assume...
  8. X

    Interacting systems and relaxation times

    I got a question I'm not sure how to state precisely or is it even valid. Any help is most welcomed. I stripped the question of all details because I wanted to emphasize my problem, but should someone think they would bring any clarity (it is a solid state problem) I'll present them. Ok...
  9. X

    Can electric dipoles violate Newton's 3rd Law?

    Why do you think forces cancel? As far as I see it, they most certainly do not! Let say dipol is oriented to +z and test charge is positive. Repulsive force z component will be negative, and attractive force by negative part of dipol will have z component also negative, so you don't have...
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    The Elegance and Complexity of Theories Beyond Special and General Relativity

    Try spinning around yourself and as you revolve, look at Andromeda galaxy up, in the skys: does it speed with warp 10? The two situation are not equivalent: inputing energy to rotate a human body is not the same as putting entire universe into a frenzy spin.
  11. X

    Magnetic Susceptibility of different compounds

    Had it for some time now ... enjoy your physics :)
  12. X

    Magnetic Susceptibility of different compounds

    Hello! Maybe you'll find http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf" usable.
  13. X

    Why does blackbody radiation exist?

    One way to see it is through equipartition theorem stating that every degree of freedom (DoF) in thermodynamic equilibrium takes up kT/2 energy on average. If you start with finite number of matter DoF possessing all available energy (i.e. an object at temperature T) coupled to an "array" of...
  14. X

    Semi-idealized atomic gas and it's free expansion in vacuum

    Hello! I was thinking about what would happen if an atomic gas was allowed to expand in vacuum and concluded I don't have much of a handle on the subject, so if anyone would help me out - I'd really appreciate it. So, let's say we have an ideal gas in a container located in vacuum...
  15. X

    Is the expectation value of momentum of a stationary state zero?

    Well, I'm not sure this is true for any V(x). Namely, if you take V(x) = 0, then you would not get <p> = 0, obviously. If you are thinking of bound states, it kinda feels one could devise up such V(x,t) to get <p> != 0. But I'll think this trough ...
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