Recent content by jefo

  1. J

    B How Is Solar Wind Temperature Measured?

    Oops again. The equipotential equation for determining the average mass of particles is m=4.14×10^-23T/v^2. I missed the "^-23". Though even with the right equation, the result is still nonsense (the average mass of the particles is NOT 1/36th that of a proton).
  2. J

    B How Is Solar Wind Temperature Measured?

    I mean VELOCITY was slightly higher (than 400 km/second).
  3. J

    B How Is Solar Wind Temperature Measured?

    It is embarrassing to have revealed myself to be such a moron, by posting replies (and even this whole thread) prior to doing a little more research. That said, my research has revealed a web page posting ongoing readings taken by a satellite hovering 1% sunward of the earth...
  4. J

    B How Is Solar Wind Temperature Measured?

    Re: Comment by phinds: Good point. Motion is relative. In that case, so is energy. For that matter, temperature would also be relative to a frame of reference, although that is hard for me to visualize.
  5. J

    B How Is Solar Wind Temperature Measured?

    I have to disagree. Unless the proton is in a particle accelerator, it has a temperature, according to this definition: "In science, temperature is a measure of hotness or coldness, which in turn is a measure of the kinetic energy of particles." Maybe I should have said 'typical' proton, or...
  6. J

    B How Is Solar Wind Temperature Measured?

    That question reminds me of, "Why do you think a tree falling in the forest makes any noise if there is no one around to hear it?" If you could stick a thermometer in (you name it), you will not only see indication of temperature, you will also see the rate of increase or decrease of that...
  7. J

    B How Is Solar Wind Temperature Measured?

    What a wonderful article. Although it helps answer my question, it also reveals at least two more. One new question is: Is there a sorting process going on, separating higher energy particles occurring in the distribution, or is there another acceleration force active here? Quoting from the...
  8. J

    B How Is Solar Wind Temperature Measured?

    Okay, renormalize. Let me try again. To determine the AVERAGE (proton) particle speed streaming out of the sun, I can rearrange the equipartition equation thus: v^2 = 3kT/m. Plugging in 1.38x10^-23 (Boltzman constant) for k, 1,000,273 degrees Kelvin for T, and 1.67×10^-27 (mass of a proton in...
  9. J

    B How Is Solar Wind Temperature Measured?

    I read that the solar wind is a stream of particles, primarily electrons and protons, flowing out from the sun at speeds as high as 900 km/s, and at a temperature of 1 million degrees. Using the equipartition theorem, I calculate that a proton moving at 900,000 meters per second exhibits a...
  10. J

    Momentum vs kinetic energy help

    This conversation is about a thought experiment, not an actual trial. We want to understand and predict what happens to the energy in a collision between two blocks (or automobiles or football players or whatever), not set up an actual frictionless surface with calorimeters, etc. So let us...
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