Recent content by ZachWeiner

  1. Z

    Graduate What is the energy of the scattered photon?

    So, while working some problems in my modern physics books, I met this question: A photon whose energy equals the rest energy of the electron undergoes a Compton collision with an electron. If the electron moves off at an angle of 40 degrees with the original photon direction, what is the...
  2. Z

    Undergrad Atmospheric Density - Equation to Model from Sea Level to 200km

    Hey, does anyone have an equation that roughly models atmospheric density from sea level to about 200 km up?
  3. Z

    Undergrad Understanding Vapor Pressure Laws for Astrophysics

    So, I'm new to astrophys, and I'm having trouble making a model because I don't think I understand an equation. It's a vapor pressure law, and it says it takes the form of log(pressure) = A-(B/T) T is in kelvins, A is 10.6, and B is 13500. Apparently pressure ends up being dynes/cm^2...
  4. Z

    Graduate Reading my first Astrophys paper

    Okay, that makes sense. Any idea how I could convince MatLab to make such a matrix for me :)
  5. Z

    Graduate Reading my first Astrophys paper

    I'm getting a little stuck on terminology, but most of it can be looked up in wikipedia. However, there's one term I'm having trouble with. The paper is for a model of micrometeorites entering the atmosphere. It says: "Entry velocities ranged between 11.2 and 72 km/sec following a v^-5,394...