Recent content by cosine

  1. C

    Is Total Energy Different from Energy Density for a 1D Standing Wave?

    trivial... maybe not or perhaps I would not be posting... The wave equation has no dependence in 'x' and 'y' indeed,however I am not integrated that function to get the total energy. I got the energy density (Question 1) which is h = rho * (A*Omega/2)^2 A being the amplitude of the wave...
  2. C

    Why Did They Add 2π When Shifting AC Circuits?

    Oh my god... you are right, I can't believe I didn't think of it this way... That totally makes sense !:biggrin: Thx
  3. C

    Is Total Energy Different from Energy Density for a 1D Standing Wave?

    Here is a detail that makes me doubt: Homework Statement I am given the equation for a standing wave with a dependence in 't' and 'z' only... I am told that the wave is propagating in a confined space (2*2*2) m Q1. Calculate the energy density for n=1,2,3. I didn't have any pb with this...
  4. C

    Why Did They Add 2π When Shifting AC Circuits?

    Hi everyone, I ran into the following little problem: Homework Statement Given v=40 cos(100*pi*t + pi/3), the question is: what is the minimum number of millisec that the function must be shifted to the left if the expression for v is 40 cos(100*pi*t) Homework Equations The...
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