Recent content by Ein Krieger

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    Couldn't understand the way the problem is solved regarding resistivit

    Hello, I was observing the solution of the following problem below: Below it says that reducing the cross-sectional area of the wire triples its length. However, according to cross-sectional area equation A=pi*r^2 we observe that reduction of area only leads to reduction of radius ...
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    Finding diagonal of inscribed rectangle

    be cause it is a rule for all rectangles?
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    Finding diagonal of inscribed rectangle

    Homework Statement A quadrant contains an inscribed rectangle ABCD. Given the distance marked: CD=3m , what is length of AD? Homework Equations Area of circle = pi*r^2 Pythagorean 's theorem : a^2=b^2+c^2 The Attempt at a Solution We can draw diagonal from C to B similar to...
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    Whic topic can I study to solve the following mechanics problem?

    Thanks for explanation, but I couldn't access the link you posted below. Is there any other viable sources about that topic?
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    Whic topic can I study to solve the following mechanics problem?

    Hey, Can you please tell which topic is related to the solution of the following problem. I first would like to try it and , if I get stuck, I will ask for help. http://s019.radikal.ru/i611/1306/c7/a3836fbc6f9c.jpg
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    How to correctly code the expression with Ei function?

    Here is the equation to be solved : The red equation belowi the analytical solution I want to get solution for. The data to be used: The following data is to be used: t=3000000 r=nr=nx=161 q=0.02 k=5e-13 mu=0.00035 c=1.5e-8 phi=0.25 rw=0.1 h=4.5 My code is below...
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    How to correctly code the expression with Ei function?

    Hi, I am trying to incorporate the following equation into Matlab in the red: http://http://www.radikal.ru][PLAIN]http://s018.radikal.ru/i518/1305/16/1cc0d2a72d38.jpg The following data is to be used: t=3000000 nr=nx=161 q=0.02 k=5e-13 mu=0.00035 c=1.5e-8 phi=0.25 rw=0.1 h=4.5...
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    MATLAB How to display all calculation results in Matlab

    What do xint and yint stand for?
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    MATLAB How to display all calculation results in Matlab

    What do xint and yint stand for?
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    MATLAB How to display all calculation results in Matlab

    Hi, How can I set Matlab to display all the calculation results? I am solving the system of ODEs with large spatial variable and time step distribution. If I set total time to 100 with time step of 1 only the results starting from t=50 are displayed. How to fix it?:frown: Thanks.
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    MATLAB How code the following expression into Matlab

    Hey, guys How can the following equation be entered into matlab: http://i074.radikal.ru/1304/fe/a8b8e0fccbe5.png Thakns.
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    MATLAB Can't run my main Matlab file related to ODE solution

    Guys, I need to solve by Matlab the following PDE: I am desperate about finding solution; I have tried many approaches, and the files attached on topic start is my last approach.
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    Undergrad Is this PDE linear or non-linear?

    Ok. What kind of method can you suggest to deal with [∂p/∂x] 2 ? I am going to convert the above equation to ODE by method of lines in Matlab. I guess that non-linear terms require special approach.
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    MATLAB Can't run my main Matlab file related to ODE solution

    Hey, mate You can download dss004 m file from the following link: https://www.physicsforums.com/showthread.php?p=4292439#post4292439. I couldn't upload the dss004 file, so decided to redirect you to my previous post where I have already atttached dss004.
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    Undergrad Is this PDE linear or non-linear?

    hello, guys Below is the equation I am concerned with: Is the above equation non-linear because of (delta P/delta x)^2 term assuming other variables are constant and don't change with pressure , P?