Recent content by j2dabizo

  1. J

    Calculating Secondary Electron Energy After 2 MeV Photon Scattering

    Hi everyone, Really struggling to find anything on the internet to solve this problem. I really thought it would be an easy plug and chug equation..but I can't find it anywhere. Basically, I was asked to find what the maximum and average energy of secondary electrons produced by 2 MeV...
  2. J

    Solving for Two Speeds of an Ideal Gas He at a Given Temperature

    Ok..I went back to this problem and still pretty stumped! the given is ideal gas He at temp= 328K This is a maxwell speed distribution problem. we need to give 2 values of v that are in m/s for the equation 2F(v)=F(v*) The maxwell speed distribution equation is given as F(v) dv =...
  3. J

    Solving for Two Speeds of an Ideal Gas He at a Given Temperature

    v* = most probable speed http://en.wikipedia.org/wiki/Maxwell%E2%80%93Boltzmann_distribution I assume you use the maxwell speed distrtibution equation but for f(v) you but in f(v*) and solve the equation using v*. Then after you find the answer form f(v*) i guess you divide it by two to...
  4. J

    Solving for Two Speeds of an Ideal Gas He at a Given Temperature

    Again not really sure where to start here. All the teacher told me was to use the Maxwell Speed Distrubution. Any help will be greatly appreciated...I'm stuck.
  5. J

    Cannot figure out how these conversion factors came about to this answer?

    Homework Statement I have an equation with all known variables and I have the answer...I just can't figure out how they converted the variables and came about the answer. The first equation is N/V = [2*pi*(2.315)/h^3][2*m*kT]^3/2 we have the known variables h (plank's constant)=...
  6. J

    Solving for Two Speeds of an Ideal Gas He at a Given Temperature

    Homework Statement For an ideal gas He at T = 328 K find the two speeds v that satisfy the equation 2F(v) = F(v*). m/s (lower speed) m/s (higher speed) Which of the two speeds you found is farther from v*? the lower speed or the upper speed Explain this result. Homework...
  7. J

    97.9747 = sinh (6.2737x10^9) How did they solve this?

    nevermind..had a brain fart ...just sinh[SUP]-1[SUP](97.9747)
  8. J

    97.9747 = sinh (6.2737x10^9) How did they solve this?

    97.9747 = sinh (6.2737x10^9) How did they solve this?? Homework Statement Just an equation that I don't understand how they calculated. 97.9747 = sinh(6.2737x109)... 6.2737x109 = 5.2779 how did they get the 5.2779 ?? Homework Equations The Attempt at a Solution
  9. J

    Energy and Excited States in Semi-Infinite-Well Potential

    Homework Statement Use the semi-infinite-well potential to model a deuteron, a nucleus consisting of a neutron and a proton. Let the well width be 3.5*10-15 m and Vo -(minus) E = 2.2 MeV. Determine the energy E (in MeV). How many excited states are there? 0 1 2 3 4 5 What are their...
  10. J

    Can a 1.1 eV Proton Tunnel Through a 2.4 eV Barrier?

    Homework Statement A 1.1 eV electron has a 10-4 probability of tunneling through a 2.4 eV potential barrier. What is the probability of a 1.1 eV proton tunneling through the same barrier Homework Equations eq 1) T= [1 + V02 sinh2(kL)/4E(V0-E)]-1 or if (kL)>>1 we use eq 2) T=...
  11. J

    Tunneling equation have all the pieces, just can't figure out the calculation

    this was my issue..thanks! Too many constants! lol
  12. J

    Tunneling equation have all the pieces, just can't figure out the calculation

    Tunneling equation...have all the pieces, just can't figure out the calculation! Hi, I have an example from my book on Tunneling. All the parts of the equation are given, including the answer...put I keep comming up with the inccorect answer. Maybe someone can clarify how to calculate...
  13. J

    How do you calculate the speed of a particle given its Total and Kinetic energy?

    Just curious on this method. I seemed to be getting caught up on the method here. I'm given a K.E. amd Total Energy of a proton, and I was asked to find the speed. So what is the equations and steps for these. This is not a homework question, just me trying to wrap my head around the...
  14. J

    Find minimum energy of a photon to produce 25keV electron in compton scatter?

    Homework Statement What is the minimum energy that photons must have to produce 25 keV electrons in a Compton scattering? (answer in keV) Homework Equations Not too sure here, We know Eincident= Efinal + K.E.electron We know that the work function (binding energy) is also taken into...
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