Recent content by virgileso

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    Thermal Cross Sections: Find Info on Boric Acid, O2, Uranium, Water, etc.

    Where can I get reliable information on the cross section of various substances: boric acid, O2, Uranium, water, etc?
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    Temperature, Humidity & Why - Understand Air's Influences

    The humidity of air is influenced in part by temperature, in that the higher the temperature, the higher the capacity for water vapour. What I'm trying to figure out is why. I can come up with a couple ideas, ranging from hydrostatics to increased energy keeping liquid bonds from forming; but...
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    Find Wavelength: Help Solving Refractive Index & Plasma Freq.

    I'm trying to determine the wavelength of a particular situation. I'm given the refractive index of the metal and the value of the plasma frequency, and I'm asked to find the wavelength (or frequency) of a particular ray in this situation. Unfortunately, I'm not terribly able to even begin...
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    Matrix Multiplication of \delta_{ij}v_j = v_i

    Then shouldn't the unity matrix give another row vector as an answer? I'm trying to understand how v_i = v_j
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    Matrix Multiplication of \delta_{ij}v_j = v_i

    Homework Statement Show by matrix multiplication, \delta_{ij}v_j = v_i The Attempt at a Solution I'm having trouble understanding how to do this, because I'm under the impression that v_j is a row vector, which can't be multiplied by a 3x3 matrix which \delta_{ij} is; or am I horribly...
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