Recent content by jkrivda

  1. J

    Hyperfine Splitting In A Magnetic Field

    1. Problem: Consider Hydrogen in its ground state in a magnetic field of magnitude B. Compute the effect of the magnetic field on the hyperfine structure of Hydrogen (that is you should include the interaction of both the proton and electron magnetic moments with the applied magnetic field)...
  2. J

    Computing Jupiter's Thermal Time Scale

    so i just convert the solar luminosity fraction to erg/s and then plug and chug?
  3. J

    Computing Jupiter's Thermal Time Scale

    1. Jupiter radiates more energy than it receives from the Sun by 8.7x10-10L0. Jupiter's radius is 7.0x109cm and its mass is 1.9x1030g. Compute its thermal time scale. Could gravitational collapse power this luminosity for Jupiter's entire lifetime of 4.5 Gyr? 2. Kelvin-Helmholtz (aka...
  4. J

    Deriving Jeans' Mass for Gravitational Collapse

    thanks for the help, guys! i referenced the carrol/ostlie text and managed to get a near-perfect score on my problem set. =]
  5. J

    Deriving Jeans' Mass for Gravitational Collapse

    yes, that helps. with that info, i can derive the required jeans' mass, with some arbitrary coefficient before the variable terms. my textbook hasn't arrived by mail yet, and i am worried about not giving enough reasoning behind my derivation. is there any way you can give me a little...
  6. J

    Deriving Jeans' Mass for Gravitational Collapse

    I need to show that the critical (Jeans') mass for a hydrogen cloud of uniform density to begin gravitational collapse can be expressed as: M=(v^4)/((P^.5)(G^1.5)) Where v is the isothermal sound speed, and P is the pressure associated with the density ρ and temperature T. I don't...
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