Recent content by meanyack

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    Find Angle Between Vectors C & D Using Alpha, Beta & Theta

    At first glance, it seems easy. But when you try to find the angle between vector C and plane consisting A and B, then it seems complicated. So is there any way to calculate it easily?
  2. M

    Find Angle Between Vectors C & D Using Alpha, Beta & Theta

    Homework Statement Please find the attachment for vectors. If I know \alpha, \beta & \theta (colored angles) how can I find the angle between vectors C and D in terms of \alpha, \beta & \theta ? Homework Equations Cross product & dot product The Attempt at a Solution
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    How to Measure Circuit Output with SRS830 Lock-in Amplifier Using Labview?

    Problem isn't drivers. I have the necessary drivers. The problem is how I can make a setup and make a .vi file.
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    How to Measure Circuit Output with SRS830 Lock-in Amplifier Using Labview?

    Hi to all, For a project I need to measure output (as Volts) of a circuit. I want to do this with a SRS830 lock-in by using Labview application. Google search gave me nothing. If anyone knows how to set this up, please help. Thanks
  5. M

    Discrete or continious spectrum in QM

    Homework Statement Here is the question: how can we know that if we have discrete or continuous spectrum just by looking at the potential graph? Specifically, let`s consider the potential V(x)=-F*x (F:const) . After we solve, we can conclude wavefunctin is airy function, and so both...
  6. M

    Trying to figure out integral with infitnite limites

    As Dick said, firstly let u=\frac{x-x_{0}}{a} then du= adx and now integral becomes \frac{1}{a^{5}}\int^{\infty}_{-\infty}\frac{1}{1+u^{4}}du Secondly, by letting u=e^{i\theta} and du=i*{e}^{i\theta}d\theta you can use "residue theorem". Yet, I forgot...
  7. M

    Finding Average <x> for Probability Densities

    I forgot to say that you must normalize this function ie \int_{a}^{b}\left|P(x)\right|^{2}*dx=1 if the interval is not given you'll probably use [-\infty,\infty]. So that you can determine the constant "A".
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    Finding Average <x> for Probability Densities

    use this integration \int_{a}^{b}\left|P(x)\right|^{2}*x*dx in the given interval [a,b] At least, we're doing so in quantum meachanics
  9. M

    Electromagnetic theory: potential problem

    Hey guys, our instructor posted the answer to the question. I never thought spliting the problem like in answer... The method is quite impressive. If you wonder, here is the link http://www.fen.bilkent.edu.tr/%7Ebulutay/315/hw3_s1.gif http://www.fen.bilkent.edu.tr/%7Ebulutay/315/hw3_s2.gif
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    Electromagnetic theory: potential problem

    Actually, I was wondering that. This can help me... thanks
  11. M

    Electromagnetic theory: potential problem

    The boundary conditions are on the picture Let me write them again v(x=0,y)=0 v(x,y=0)=0 v(x,y=a)=0 while x goes to inf, V(x,y)=Y(y) Edit: You said " You cannot combine the two solutions and expect the same result as if you had done it properly the first time." but, yes we can...
  12. M

    Electromagnetic theory: potential problem

    Did you mean Fourier transform or Fourier series expansion? You know, they are different
  13. M

    Electromagnetic theory: potential problem

    If you don't seperate, you can't find the constant k=n*pi/(2*a) because, in original shape boundaries are different so you can't choose a cyclic function ie f(x)=f(x+T). Actually, it's not an easy question, because you will be stuck when you look try to solve first part. To understand, give...
  14. M

    Electromagnetic theory: potential problem

    Homework Statement To see the problem, please click the link below: potential_problem.jpg Homework Equations \nabla^{}2V=0 Seperation of variables: V(x,y)=X(x)Y(y) The Attempt at a Solution For simplicity I divide problem into two parts: 1st part- Click the link below...
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    How can [a+,[a+,a]]=0 be proven in the quantum oscillator system?

    why can't I see a button "delete topic" because this is the wrong topic, the original one is the other one
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