Recent content by johnio09

  1. J

    A Should luminosity distance be 0 at z=0?

    eq 19 in Hogg, however, is a function of luminosity and flux. In eq 2 of the other paper they state that luminosity distance is purely a function of redshift, if I am not mistaken. How would I be able to relate Hogg's equation to make it so that it is only a function of redshift?
  2. J

    A Should luminosity distance be 0 at z=0?

    I am working on coding up the luminosity function for blazars but I have ran into a problem. In equations 1-3 of this paper https://arxiv.org/pdf/1912.01622 they state that the flux can be broken down into two components: one where z=0 and one part that is the evolutionary factor. The problem I...
  3. J

    How does the presence of a cube resistor affect current flow in a circuit?

    I would think that it is 2 A (6/3 because there are three wires the current can go to), but this does not seem to be correct.
  4. J

    Struggling With Part C of Electric Field Calculation

    I've figured out parts A and B but I'm struggling with Part C. I used the equation V = kQ1/r1 + kQ2/r2 where Q1 = -4.4e-12C ; k = 8.98755e9 r1 = 0.026 m Q2 = 27.4e-12 and r2 = .051-.026 My answer (8.329 V) is wrong but I have no idea why. Please help if you can.
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