Recent content by eluu

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    Calculate d2z/dx2 at x=10 Using Finite Differences

    Given the elevations of five points that are equally spaced by distance 'h' in a horizontal direction, derive a general expression to determine the second derivative of slope at the central point with an accuracy of order h3 If elevation is given by 'z' and horizontal distance by 'x', use...
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    How is a matrix diagonalised?

    Ok thanks cos i was getting worried i wasn't getting the same answers for P and D that is given in one of the tutorial books that I'm using where my answers just differed by column arrangements
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    How is a matrix diagonalised?

    I understand this but is there more than one answer for D? Using my example in the 1st question i could get 1 | 0 | 0 0 | 3 | 0 0 | 0 | -4 or 1 | 0 | 0 0 | -4 | 0 0 | 0 | 3 etc..simply by assigning a different first eigenvalue from either 1, 3, or -4
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    How is a matrix diagonalised?

    So it doesn't matter the order in which you order the eigenvalues? Cos that would produce a slightly different diagonal
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    How is a matrix diagonalised?

    Hey guys, I'm having trouble trying to understand how the diagonalised matrix is produced e.g. A = 1 | 3 | 0 3 | -2 |-1 0 | -1 | 1 I've calculated the eigenvalues to be 1, -4, 3 My question is, how do we know that D = 1 | 0 | 0 0 | 3 | 0 0 | 0 | -4 and not any other combination of 1...
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    How Far Does a Rocket Sled Travel with Variable Acceleration?

    Ahh whoops, i see it now :) Now i get the first part with t = 10s and a displacement of 1833.333m Thanks cristo!
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    How Far Does a Rocket Sled Travel with Variable Acceleration?

    [SOLVED] Motion Question (Dynamics) EDIT: I just realized this question was better suited in this forum than the engineering one, sorry :( Homework Statement The rocket sled starts from rest and accelerates at a = 30 + 2t until its velocity is 400m/s. It then hits a water brake and...
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    Engineering Dynamics (Motion related)

    Homework Statement The rocket sled starts from rest and accelerates at a = 30 + 2t until its velocity is 400m/s. It then hits a water brake and its acceleration is a = -0.003v^2 m/s^2 until its velocity decreases to 100 m/s. What total distance does it travel? Homework Equations v = u...
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    Calculate Stress & Strain from Lab Results for Steel

    Ok don't worry i think i figured it out
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    Calculate Stress & Strain from Lab Results for Steel

    How would i calculate the stress and strain with the results from a lab below: Steel’s original diameter: 8.00 mm Steel’s original length: 49.96 mm Steel’s final diameter: 4.64 mm Steel’s final length: 63.17 mm Steel’s maximum load force: 26.43 kN I also have an MS Excel table of time, laser...
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