Recent content by DanAbnormal

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    A way to express scalar triple product from inter-vector angles?

    Im not sure if your answer is equivalent, though I'll post what I have more explicitly. In Mathematica, I have specified the three following vectors in terms of their spherical polar angles: x1 = 0 Degree; x2 = 0 Degree; x3 = 180 Degree; z1 = 0 Degree; z2 = 120 Degree; z3 = 240...
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    A way to express scalar triple product from inter-vector angles?

    Hi, I'm trying to find a general expression for the scalar triple product for 3 vectors in a simultaneous configuration, that depends only on the inter-vector angles, A1, A2 and A3. I have expressed this quantity in terms of the spherical polar coordinates of the vectors (the length being...
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    Possible Outcomes of Measuring Spin-1 Particle in Different Axes

    Oh thanks guys! That makes sense to me now, considering all the maths I've just done. I was following a procedure just not totally getting it. But do now!
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    Possible Outcomes of Measuring Spin-1 Particle in Different Axes

    Well what I did was obtain the eigenvalues of the Sx matrix (without the hbar/(root 2) element ), which turned out to be 0, and +/- root 2 I then obtained the eigenvectors, for these, which when acted on by Sx gives 0, hbar/2, and -hbar/2 as possible outcomes, and the probability I got for the...
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    Possible Outcomes of Measuring Spin-1 Particle in Different Axes

    When I act Jx onto |0> I get the added superposition of |1> and |-1> [(1,0,0) and (0,0,1)] both weighted by \hbar/2 But |0> is not an eigenvector of Jx is it? so what meaning does this action have? If the measurement in the z-axis defined the particle to be in state |0> in that axis, then...
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    Possible Outcomes of Measuring Spin-1 Particle in Different Axes

    Homework Statement A spin-1 particle is measured in a stern gerlach device, set up to measure S_{z}. What are the possible outcomes? In this case, the outcome is zero. The same particle is measured by a second deviced which measures S_{x}. What are the possible outcomes of this...
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    Understanding Ortho- and Para- Water: Explaining the Physics behind Ka+Kc+v3

    I do not know the answer to the first question. But for the second question, I understand the following: The total wavefunction is a superposition of individual states corresponding to rotation, vibration, nuclear and electron. Both the rotational state and nuclear spin state can be...
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    Understanding Ortho- and Para- Water: Explaining the Physics behind Ka+Kc+v3

    I was wondering if anyone was familiar with what I am stuck on. I understand the origins of ortho/para hydrogen, and how it is extended to the water molecule. For 2 hydrogens: If total nuclear spin = 0 -> Singlet state (para) of total nuclear spin = 1 -> Triplet state (ortho) This...
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    CMB Power spectrum/CMB anisotropies -> Geometry of Universe

    Here is my understanding of how the anisotropies of the CMB are used to determine the geometry of the universe: The fluctuations represent fluctuations in temperature just at the moment of last scattering, and therefore are a 'fingerprint' for the fluctuations in density of particles. We can...
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    Just a quicky (Schrodinger's equation)

    Oh sorry, the question asks me to show that \psi(x) = exp(ikx) is a solution of the time-independent schrodinger equation. The potential is zero, yes. So I get the equation for Psi as: \Psi(x,t) = \exp(ikx).exp(-iEt/\hbar) From the separation of variables stuff. Well yeah ok, its not...
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    Just a quicky (Schrodinger's equation)

    Homework Statement Currently I am doing a question where its asked me to show that the probability per unit length of finding a particle is independent of space and time, and is just a constant. Homework Equations The Attempt at a Solution The plane wave state I've been...
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    How Does the Structure of N2 Affect Its Kinetic Energy Calculation?

    Sorry, "N" isn't the number of molecules. Its supposed to be N subscript 2, as in "N" for Nitrogen. Does the subscript 2 make the N from the equation = 2?
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    How Does the Structure of N2 Affect Its Kinetic Energy Calculation?

    Just a quickie. For example, the total kinetic energy of N molecules is = (3/2)NkT = (3/2)nRT If a question were to ask you to find the such energy for a sample of N_{2} would it make the equation (5/2)kT? Does the subscript 2 make it diatomic, and hence have two molecules, I am not sure...
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    What is the four-vector momentum of the fused particle X in the lab frame?

    Sorry, I am not too sure what most of that means, could you explain?
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    Deriving the Coefficients of an Infinite Power Series

    Homework Statement Show that if a function f(x) can be expressed as an infinite power series, then it has the form f(x) = f(x0) + \sum^{\infty}_{n = 1}\frac{f^{n}(x0)}{n!}(x - x0)^{} Homework Equations The Attempt at a Solution I know that for an infinite power series: =...
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