Recent content by rbnphlp

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    What is the torque on each dipole about its centre in a given electric field?

    Homework Statement Cosnider two dipoles, p1 oriented along z at the origin, and p2 oriented along x at a distance r in the x - y plane. Given that the torque on a dipole in a field E can be written N = p x E, find the torque on each dipole about its centre. Homework Equations N=pxE , E=...
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    Solving Polarization Question for Electric Field in Spherical Shell

    A thick spherical shell (inner radius a, outer radius b) is made of dielectric materials with a "frozen-in"polarization P(r) =k/r rhat; where k is a constant and r is the distance from the centre. There is no free charge. Find the electric field E in all three regions by two different...
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    Proving Hermitian Operators: (A+B)^n Remains Hermitian | Step-by-Step Guide

    If A and B are hermitia operators , then prove (A+B)^n is also hermitian. Justw ondering if this would suffice ? ∫ ψ^*(A+B) ∅ dt= ∫((A+B) ψ)^* ∅ dt assuming (A+B) is hermitian I can do that again ∫ ψ^*(A+B) ∅ dt= ∫((A+B) ψ)^* ∅ dt multiply them together ∫((A+B) ψ)^(2*) ∅^2...
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    Programs Poor Iq , but want to do a PHD

    Thanks guys for the reassurance , I will just keep at it ..and see if I wil make it :D
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    Programs Poor Iq , but want to do a PHD

    Thought I might Bragg about it , but obviously backfired :pJust kidding, I kind of set this goal , that if I don't have an IQ of 125 or above , I won't be able to contribute anything in physics .. So I might well do some kind of other job like teaching or finance or something ..
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    Programs Poor Iq , but want to do a PHD

    For those who , think I am not real ..take a look at the threads I created for the last two years . I doubt a troll would take that much effort to do that ..I might be lying about my location (beacause I didnt want people to recognise me) .But as I said I am a theoretical physicist studying in...
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    Programs Poor Iq , but want to do a PHD

    Hi all, Today I got my mensa test scores back , it was 104 ..Im a 3rd year theoretical physicst in one of the top universities in the US , with a first in my first year and 2nd year . I was planning to do a PHD later , but this test has dented my hopes ..I am quite good at maths , maybe the...
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    Mathematica Definiing two functions (mathematica)

    Yes ,thats what I want ..But how do I put into mathematica ? If just insert what you have written I get RandomReal::unifr: "The endpoints specified the uniform distribution range are not real valued I also Tried, g[s_] := RandomReal[{-Sqrt[s^2 - f[s]^2], +Sqrt[s^2 - f[s]^2]}]...
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    Mathematica Definiing two functions (mathematica)

    I need to define two functions for a molecule with speed s. a)it has a horizontal velocity between -s and s b) v , the vertical velocity between +Sqrt[s^2-u^2] and -Sqrt[s^2-u^2] This is what I have done for a) f[s_]:=RandomReal[{-s,s}] for b)...
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    Mathematica Animating in Mathematica: Creating a Bouncing Point in a Box Tutorial

    Does anyone know how would I go about making a point , bounce up and down in a box in mathematica? Would greatly apperciate for any help.. Thanks
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    Physics Programming in theoretical physics

    cheers for the advice ..
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    Physics Programming in theoretical physics

    What if , I master in say maths , rather than theretical physics , does it change anything ..Im talking like abstract algebra
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    Physics Programming in theoretical physics

    Ok , Programming and me haven't been the best of friends . It kinds of irritate me , although I can follow the logic of what's going on , I find it very hard to come up with the code , I make a error and find it impossible to correct the error .What I have been learning so far is MAthematica ...
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    Calculate Complex Integrals with Series of Sin Z

    By parameterizing the curve (not by Cauchy's theorem) and using the series of sin z, nd the value of ∫z^k sin(z)dz around a closed Contour C where C is the unit circle z=e^(iθ), for 0≤θ<2π What do they mean by using series of sin z ? I mean if I expand it .. I get e^(iθ)- e^(3iθ)/3! --- and...
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