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  1. D

    Fourier series

    I don't solve fourier series of 1) sinh t :-1<t<1. 2) 1+ltl : -p<t<p anyone please suggest to me. Thank you very much
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    Heat Transfer Problem in Cylindrical

    Why this problem is not depent on seta. and h ?
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    Heat Transfer Problem in Cylindrical

    Anyone please help me. I don't understand this problem. Thankyou
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    Laplace's equation

    I can solve variable of x and y but variable z i can not solve it. Anyone please suggest me. Thank you
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    Laplace's equation

    please help Anyone please help me. I can not solve it. Thank you
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    Laplace's equation

    please help I can solve this equation for y only and x , z. I can't find it. Please describe to me. Thank you.
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    Laplace's equation

    Heat equation Given the 3-D rectangular solid with sides of length a, b and c in the x, y and z directions, respectively. Find the function T(x,y,z,t) when Laplace(T)=1/K(dT/dt) subject to the following conditions: 1) Initial conditions: T(x,y,z,0)=0 2) Boundary conditions a. dT/dx +...
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    Heat Transfer Problem in Cylindrical

    I don't understand this problem. I think it is difficult for me. Please anyone suggestion this problem to me. Thanf you Let us cosider steady state heat transfer problem in which laplaceT(r)=0 What is the temparature at the center of a thin disc of radius a whose average boundary...
  9. D

    Laplace's equation

    Thank you very much for your suggestion. I can solve it I have a new problem. Please suggestion to me Let us cosider steady state heat transfer problem in which laplaceT(r)=0 What is the temparature at the center of a thin disc of radius a whose average boundary temparatue is 70 degree...
  10. D

    Heat conduction

    Given the 3-D rectangular solid with sides of length a, b and c in the x, y and z direction respectively. Find T(x,y,z) in the interior of the solid when laplace T = 0 Boundary condition are following conditions: 1) x=0, T=0 2) x=a, dT/dx=0 3) y=0, dT/dy=0 4) y=b, dT/dy=0 5) z=0, T=0 6)...
  11. D

    Laplace's equation

    Given the 3-D rectangular solid with sides of length a, b and c in the x, y and z direction respectively. Find T(x,y,z) in the interior of the solid when laplace T = 0 Boundary condition are following conditions: 1) x=0, T=0 2) x=a, dT/dx=0 3) y=0, dT/dy=0 4) y=b, dT/dy=0 5) z=0, T=0 6)...
  12. D

    Laplace's equation

    How to solve Laplace's equation in three dimensions? Please anyone suggest me
  13. D

    Central Force

    I find V(r) = -k/2r^2 + L^2/2mr^2 a part of r^2 of two terms are equal. Which total graph of V(r)
  14. D

    Central Force

    I don't know a shape of V(r) versus r
  15. D

    Central Force

    I have a problem for this question, please help me A particle of mass m is moving in an attractive inverse cubed force given by F = -K/r^3, where K>0 a) Find V(r) and plot V(r) versus r. b) Discuss the motion qualitatively by...
  16. D

    Spin and Magnetic Moment

    I don't understand this problem, please help me a) Show that sigma_subscript (y) is Hermitian
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    How to solve the integral of Ax^2 * exp(-x^2/2a^2)

    Please healp me What is the solution of equation? intregal of Ax^2*exp(-x^2/2a^2)
  18. D

    Equation order x^3

    I can't find the solution of this equation Cx^3-2Ex+2k = 0 please help
  19. D

    Classical Mechanics

    w(omega) = sqrt(k/m) is correct?. if correct how can to find values k?. please explain
  20. D

    Quantum Mechanics, one-dimensional box problem

    What are the energy eigenfunctions and eigenvalues for the one-dimensional box problem describ above if the end of the box are at -a/2 and a/2 I can find the solution of this problem Phi(x) = Asin kx + Bcos kx and property of wavefunction is continuous at boundary Phi(x=-a/2) =...
  21. D

    Classical Mechanics

    A mass m is move in potential U(x) = -a/x+b/x^2 I can solve this problem to find force F(x), stable point, turnning point but i can't to find the equation of period of the mass for boundaring movement please help
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    Dirac delta function

    i can't solve there problem, please help me 1) delta(y^2-a^2) = 1/absolute 2a[delta(y-a)+delta(y+a)] 2) f(y)delta(y-a) = f(a)delta(y-a)
  23. D

    Curl v = 2w_k, help me

    I don't understand. please explain to me again. Thank you.
  24. D

    Vector field

    i think you mean, find a divergence and curl in a spherical coordinates. vector r is represent r, theta and phe
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    Time-independent wavefunction

    I have a problems, help me please a) A free particle of mass m moves in one-dimensional space in the interval 0 <= x, with enery E. There is a rigid wall at x = 0. Write down a time-independent wavefunction, which satisfies these conditions, in term of x and k wher k is the wave vector of the...
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    Vector field

    yes i known.
  27. D

    Wavefunction problem help

    Consider the wavefunction psi = Ae^i(kx+wt) ;w = omega where k is real and w(omega) > 0 and is real. Is this wavefunction an admissible quantum state for a free particle?. Justify your answer is no, in what manner would you change the given function to describe a free particle moving in...
  28. D

    Vector field

    A vector field is difined by A = f(r)r. a) show that f(r) = constant/r^3 if divergence A equal to zero. b) show that curl A is alway equal to zero
  29. D

    Curl v = 2w_k, help me

    A fluid rotates with an angular velocity w about the z-axis. The direction of rotation is related to the z-axis by the rigrt hand screw rule. a) Find the velocity v of a point in the fluid, and show that curl v = 2w_k b) If now w is a function of the radius r, show that curl...
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