Recent content by calcisforlovers

  1. C

    QM Two-State System: Determine Eigenvalues & Eigenvectors of A

    Homework Statement QM states of a system are described by linear super positions of two linearly independent state vectors psi1 and psi2. These two states are normalized but are NOT orthogonal to each other. A hermitian operator A actes on the two states in the following way. A|psi1> =...
  2. C

    Charged ring inside a conducting sphere.

    A thin charged (charge=Q) ring of radius a centered on the z axis lies in the x-y plane. The potential outside the ring is given. Now the ring is placed inside a grounded conducting spherical shell of radius b > a. What is the potential inside the ring and between the ring and the sphere...
  3. C

    Graduate Dirac Delta function and charge density.

    I have a line charge of length L and charge density /lambda on the Z-axis. I need to express the charge density in terms of the Dirac Delta function of theta and phi. How would I go about doing this?
    • calcisforlovers
    • Thread
    • Charge Charge density Delta Delta function Density Dirac Dirac delta Dirac delta function Function
    • Replies: 1
    • Forum: Electromagnetism
  4. C

    What Forces are Involved in Torque and Equilibrium Problems?

    i just noticed. in your summation of the forces in the y direction, you have the mass of the strut. mass is not a force, so it shouldn't be included in the summation of the forces. you have to find the weight of the strut. (i made a bad mistake by saying that the weight of the crate should...
  5. C

    What Forces are Involved in Torque and Equilibrium Problems?

    you're off to a good start. make sure you have the weight of the box in kg. now you need a third equation, which comes from summing the torques about the pivot and setting that equal to 0.
  6. C

    MATLAB MATLAB vs Mathematica: Which is Easier?

    mathematica rules. maple is garbage, just as an aside.
  7. C

    Average Force Formula - Solving for Force

    This is just an impulse-momentum theorem problem. Impulse = Change in momentum. Impulse is F*delta t (t=time of impact) and change in momentum is just final momentum - initial momentum. Good luck