Recent content by jsr9119

  1. J

    Two input to one,with switching through trigger (coax)

    Hey guys, I need to have a signal alternate between two inputs for coax connectors based on a trigger. Do you guys have any idea where I could find this type of hardware or how to construct it? I come from a physics background, so I haven't worked with many circuits. Thanks
  2. J

    Why Did Radon Choose Riemann-Stieltjes Over Lebesgue Integration?

    Hey guys, I'm doing a paper on the Radon transform and several sources I've come across cite the Lebesgue integral as a necessary tool to handle measures in higher order transforms. But, Radon's original paper employs the Riemann-Stieltjes integral in its place. I read that Lebesgue is...
  3. J

    Courses Maximizing Medical Physics Program Admissions: Research vs. Courses?

    Hello all, I am entering my senior year preparing to apply to Medical Physics programs. I applied to some R.E.U.s for summer research, but was not fortunate enough to gain a position at any of them. I still have an opportunity to continue an independent study at my University's laser lab...
  4. J

    Set Theory vs. EM2: Deciding My Courses

    Hello all, I'm trying to decide my courses for next semester and I'm all set except for a choice between EM2 and set theory. I've had both teachers before, and the set theory teacher is a lot better. I need EM2 for my major, but I'm afraid I'll be wasting the opportunity to take a fun class...
  5. J

    Faraday Cage: Exploring Potential

    whoops, you are right. That's my bad.
  6. J

    Faraday Cage: Exploring Potential

    I'm sorry but I disagree. Treat the metal frame of the car as a Gaussian surface, a simpler example is the potential in a hollow conducting sphere. If you look at this example: 3.2.3 Electric Potential Inside a Spherical Thin Shell Conductor, from...
  7. J

    Faraday Cage: Exploring Potential

    Kirchoff may also be a way to do this, but I found that Gauss was easier to understand. The key is Q inside, think of the lighting bolt as a ton of excess electrons. When it strikes the car, all of the excess electrons remain on the outside of the car. Then applying Gauss's law, since Qinside =...
  8. J

    Will light eventually fade away given enough distance?

    What he probably meant was that light can't be seen because it hasn't had the time to travel far enough to be observed. Since the universe has only been around for x blank-years (not sure how many) and since light can only go as fast as 3*10^8m/s, then light may only have traveled as far as x...
  9. J

    Evidence that light is a transverse wave?

    Mathematically: you can manipulate Maxwell's equations. When you do it, you end up with a wave equation which has electric and magnetic fields perpendicular to each other and with their direction of propagation.
  10. J

    Faraday Cage: Exploring Potential

    Gauss bro, s'all about Gauss's Law.
  11. J

    Bounds of a band pass filter for image processing

    That's very helpful, thank you. Do you know of any good books or articles that would go further in depth?
  12. J

    Finding Ebook Readers for Djvu Files in Argentina

    You can get which ever you reader you like. If it doesn't support djvu (or some other format) you can convert them with Calibre - http://calibre-ebook.com/
  13. J

    Bounds of a band pass filter for image processing

    Hi all, I'm working on some image analysis as a part of my research, specifically trying to match images. The method I am using transforms the image into the frequency domain and then applies a band pass (or mesa) filter to eliminate noise and the dc component of the image. I have never...
  14. J

    Force-Time Diagram for High Elevation Block Drop | Calculate Max Force

    I think you would have to look at the impulse. When the rope snaps taught would be where the maximum force is. If you get an equation to describe the impulse at a given time and then differentiate, the zero's should give you the max and mins of force, the max being the max tension on the rope...
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