Recent content by polibuda

  1. P

    MATLAB Phasor diagram - how to check angle in matlab?

    I have a problem with checking angle in phasor diagram. I print my phasor diagram and I don't know how to check angle in window. Have somebody any idea how to search that? Maybe it is not possible and I need to add function in my MATLAB code to get result.
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    Three-phase voltage inverter (some questions)

    I have no idea how to answer to these questions. Our teacher has given it to solve, but i don't know where I sholud to search informations. Could somebody recommend me valuable sources of knowledge?
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    I Solving a system of differential equations by elimination

    Well, I don't see any problem in my thread. I want to ask if this method is correct. I found a movie with way how to solve system differential equtions by elimination, but I can't verify it is ok. The film: I sent it to my instructor and he said he don't know this method, and when I want to...
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    I Solving a system of differential equations by elimination

    I would to know if I'm solving system differential equation by elimination correctly. Could somebody check my sample task and tell if something is wrong?
  5. P

    I Problem with checking solution by wolframalpha

    That is good advice. Thank you for help.
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    I Problem with checking solution by wolframalpha

    My problem is that I can't check solution of task in any calculator (only in wolfram). I have the system of differential equations: x'=3x-4y+1 y'=4x-7y+10t I solved it and the result is: but when I check result in wolfram I receive something like that: What is the problem? Are any else...
  7. P

    The resistance of an element shaped like a half-cylinder

    Could you advise me how to determine resistance in A case. I'm confused. I have no even dr in my formula.
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    The resistance of an element shaped like a half-cylinder

    I made one mistake. That is good result.
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    The resistance of an element shaped like a half-cylinder

    I consider how to determine the resistance for A case in this easy method. For C formula is: For B formula is:
  10. P

    The resistance of an element shaped like a half-cylinder

    I'm sorry. I had to have sure, that is good interpretation. Well, I have the formulas to B and C, but I consider about A. My instructor, said that in A formula is logarithm (that is advise from him), so maybe you are right.
  11. P

    The resistance of an element shaped like a half-cylinder

    This task is translated from another language. Everything is correctly translated, but person, which wrote this tasks made a lot of mistakes. But my university has still used lists with his tasks (I don't know why). I sent email to my instructor and I'm waiting for his responding.
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    The resistance of an element shaped like a half-cylinder

    Is it possible to determine resistance with two radii, length and resistivity of this element? So should I determine two more resistances and sum them with first?
  13. P

    The resistance of an element shaped like a half-cylinder

    That informations are not given in my task.
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