Recent content by Animastryfe

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    Fortran Fortran 90, how do I use random_number and random_seed?

    Thank you, this solves my problem. Is there a way to mark this thread as solved?
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    Fortran Fortran 90, how do I use random_number and random_seed?

    Hello, I was given a program written by someone else that uses random_seed and random_number to generate a matrix. I thought the output of that program should change because each execution of that program should use a different random number to create the matrix, but the output is always the...
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    Fortran Fortran90: Subroutine DSYEV and associating eigenvalues and eigenvectors.

    Thank you very much for the reply. Just to be completely clear: the columns of the matrix A are the eigenvectors?
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    Fortran Fortran90: Subroutine DSYEV and associating eigenvalues and eigenvectors.

    Greetings. I am using the LAPACK (Linear Algebra Package) software package to find the eigenvalues and eigenvectors of a large symmetrical real matrix. Specifically, I calculate a scalar from each eigenvector, and I want to graph it against its associated eigenvalue. I am using the subroutine...
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    Addition of exponentials, and relationship between variables.

    Thank you. I should think more geometrically.
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    Addition of exponentials, and relationship between variables.

    Homework Statement This is, strictly speaking, not a homework question. I have already solved this, but I think that there is a much better method to solve it. In the equation below, what relationship must w and q satisfy? If the question is not clear, please read the bottom of the post...
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    Y=y(x) of a particle on the xy plane experience F=-kr

    Thank you for the reply. I figured it out shortly after.
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    Y=y(x) of a particle on the xy plane experience F=-kr

    Homework Statement Assume a particle of mass m which is free to move on the plane x-y. The particle is experiencing a force F = −kr towards the origin. Find the equation y = y(x) that describes the motion of this particle on the plane. Homework Equations F = ma = -kr r(t) =...
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    High School Time Dilation Debate: Arguments For and Against

    My textbook for special relativity routinely uses the example of particle accelerators and high energy physics in general as experimental evidence for special relativity.
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    Spacetime Physics: teleportation to Andromeda

    Ah, I did not know that. My special relativity course has just started, so I assume we'll get to that in due course. I shall ask my professor about this question next week. Thank you for the response.
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    Spacetime Physics: teleportation to Andromeda

    Homework Statement Paraphrase: A Transporter can reduce a person to data and transmits the data by light or radio signal to another location. A person is beamed from Earth to the planet Zircon orbiting a star in the Andromeda Nebula, two million light-years from Earth. Neglect any relative...
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    Read Zapper's Thread, Still Have Questions

    MIT now uses Python for their introductory computer science class. I have heard that Python is excellent as a first language for learning programming.
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    How Much Harder Is Calculus 2 vs Calculus 1?

    I used trigonometric identities often in calculus II. Some integrals could not be solved without them. Edit: My professor's exams were difficult, but he sometimes gave us some of the identities.
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    Schools Which U.S. Universities Accept 2.3 GPA for Physics Research?

    The post you quoted did not imply that this was the only way. The OP can increase his GPA by doing much, much, much better in his later courses.
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    Is a Personal Whiteboard Worth Investing In for Studying Electrical Engineering?

    Has anyone tried the 'boards' offered by whiteyboard.com?