Recent content by OnePound

  1. O

    Second order nonlinear nonhomogeneous differential equation

    Hello, I am having a little trouble solving this equation: \frac{d^2y}{dx^2} + \frac{A}{y}(\frac{dy}{dx})^2 + \frac{B}{(y+C)^2} = D - Ex where A, B, C, D, and E are constants and, sadly, not related. So far, I've found this http://eqworld.ipmnet.ru/en/solutions/ode/ode0344.pdf...
  2. O

    General operational theory of fluorescence is

    Hello, I think the general operational theory of fluorescence is understood - a molecule accepts a photon, its electrons are excited from the ground state to a higher energy state, and, as they return to the ground state, they emit EM waves which we see as light. My question is what makes...
  3. O

    Maximum thrust - theory of rocket propulsion

    Hello all, Just wondering if anyone can give me some guidance on this: the problem is an apparent contradiction I've stumbled upon. Some sources (e.g. www.braeunig.us) suggest that maximum thrust is achieved when Pe=Pamb (i.e. exhaust pressure = ambient pressure)l whereas others say that...
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