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Problem 6.5. We will solve the pde Hint: observe the similarity between rhs and the Legendre...
Using Laplace Equation PDE 42.(a) Solve for u(r, e): That is, the region is an annulus betweenr 1 andr 2. HINT: First draw a picture of it, to get a look at the problem. Now, you should be able to re...
Using Laplace Equation PDE
42.(a) Solve for u(r, e): That is, the region is an annulus betweenr 1 andr 2. HINT: First draw a picture of it, to get a look at the problem. Now, you should be able to readily get Then, see that you have 27-periodicity, so K n (n-1, 2, ) and D-0, so u (r, θ) A' + B' In r + an infinite series with r's and θ's in it. But look at your picture:...
Physics 102 Extra Credit Legendre Polynomials Problem The following problem is worth 5 ertra credit points!...
Physics 102 Extra Credit Legendre Polynomials Problem The following problem is worth 5 ertra credit points! Consider a disk of radius R carrying charge q (un formly distributed) and lying in the ry plane as seen in the diagram. We want to determine the potential V(r,0) everywhere outside the disk, for r R (because of the azimuthal symmetry the potential doesnt depend on φ). We have seen earlier that the potential along the z-axis (when 0-0) is gr R2 V(ro-ro...
(1 point) f(az +by), ie the RHS is a inear function of z and y We...
(1 point) f(az +by), ie the RHS is a inear function of z and y We wil use the substtution oaz+ by to find an impict general solution In case an equation is in the form +yo sove the initial value problem. The right hand side of the following first order problem is a linear function of az and y Use the substitution sin(a+) We obtain the following separable equation in the varables z and t 1-sin and use cos...
2. Potential Inside a Sphere We are interested in the electric potential inside a spherical shell...
2. Potential Inside a Sphere We are interested in the electric potential inside a spherical shell that is radius a and centered on the origin. There are no charges inside the she, so the potential satisfies the Laplace equation, However, there is an external voltage applied to the surface of the shell which holds the potential on the surface to a value which depends on θ: As a result, the potential Ф(r,0) -by symmetry, it does not depend on ф-is...
Fritz John PDE 4th edition Section 8 p. 25 thanks solution (4,4) of (8.3a,b). We assume...
Fritz John PDE 4th edition
Section 8 p. 25 thanks
solution (4,4) of (8.3a,b). We assume that we are given a special solution Po 9. of h'(50) - Pof'(50) +908'(so), F(XoYo20P,90)=0 (8.4) such that A-f'(so)F, (*080, 203P090) - 8'(50)F, (XoYo»20P0,90)+0. (8.5) Q. Prove that there exist unique functions solve (8.4) under the condition of (8.5). such that h'(s)=º(s) f'(s)+4(s)8'(s) (8.3a) F(f(s),8(s), h(s),+(s),4(s))=0. (8.35) Since equation (8.3b) is nonlinear there may be one, or several, or no solution (0,4) of (8.3a,b)....
Problem 3. Consider the initial value problem w y sin() 0 Convert the system into a single 3rd order equation and solve resulting initial value problem via Laplace transform method. Express your answ...
Problem 3. Consider the initial value problem w y sin() 0 Convert the system into a single 3rd order equation and solve resulting initial value problem via Laplace transform method. Express your answer in terms of w,y, z. Problem 4 Solve the above problem by applying Laplace transform to the whole system without transferring it to a single equation. Do you get the same answer as in problem1? (Hint: Denote W(s), Y (s), Z(s) to be Laplace transforms of w(t),...
solve the PDE +u= at2 on 3 € (0,L), t > 0, with boundary conditions au...
solve the PDE
+u= at2 on 3 € (0,L), t > 0, with boundary conditions au 2x2 u(0,t) = 0, u(L, t) = 0 au and initial condition u(x,0) = f(x), at (x,0) = g(x) following the steps below. (a) Separate the variables and write differential equations for the functions (x) and h(t); pick the separation constant so that we recover a problem already studied. (b) Find the eigenfunctions and eigenvalues. (c) Write the general solution for this problem. (d)...
all parts, please For this problem, we'll solve the 3D wave equation in a box. The...
all parts, please
For this problem, we'll solve the 3D wave equation in a box. The Laplacian in 3 dimensions is a2 vu= a2 a2 ou + ay? U= and the wave equation is 22 a2 at24 = 1 (a) (3 Points) Use separation of variables with ur,y,z,t) = S(x, y, z)T(t) to get a spatial PDE and a temporal ODE for this problem, call the separation constant A. Show all your work! (b) (3 Points) The spatial equation should...
Problem 2.16 In this problem we explore some of the more useful theorems (stated without proof)...
Problem 2.16 In this problem we explore some of the more useful theorems (stated without proof) involving Hermite polynomials. (a) The Rodrigues formula says that H (6) = (-1)” (1) . (2.87) Use it to derive H3 and H4. (b) The following recursion relation gives you Hn+1 in terms of the two preceding Hermite polynomials: Hn+1(E) = 2€ H, (E) – 2n Hn-1(5). (2.88) Use it, together with your answer in (a), to obtain Hg and H. (c) If you...
Problem 1: We are interested in solving a modified form of diffusion equation given below using Fourier transforms au(x,t) The domain of the problem is-oo < x < oo and is 0 < t < oo . At...
Problem 1: We are interested in solving a modified form of diffusion equation given below using Fourier transforms au(x,t) The domain of the problem is-oo < x < oo and is 0 < t < oo . At time t = 0, the initial condition is given by u (x,0)-0 a) Take the Fourier transform on x and show that the above PDE can be transformed into the following ODE where G() is the Fourier transform of g(x) and U(w,...
Using Laplace Equation PDE
42.(a) Solve for u(r, e): That is, the region is an annulus betweenr 1 andr 2. HINT: First draw a picture of it, to get a look at the problem. Now, you should be able to readily get Then, see that you have 27-periodicity, so K n (n-1, 2, ) and D-0, so u (r, θ) A' + B' In r + an infinite series with r's and θ's in it. But look at your picture:...
Physics 102 Extra Credit Legendre Polynomials Problem The following problem is worth 5 ertra credit points! Consider a disk of radius R carrying charge q (un formly distributed) and lying in the ry plane as seen in the diagram. We want to determine the potential V(r,0) everywhere outside the disk, for r R (because of the azimuthal symmetry the potential doesnt depend on φ). We have seen earlier that the potential along the z-axis (when 0-0) is gr R2 V(ro-ro...
(1 point) f(az +by), ie the RHS is a inear function of z and y We wil use the substtution oaz+ by to find an impict general solution In case an equation is in the form +yo sove the initial value problem. The right hand side of the following first order problem is a linear function of az and y Use the substitution sin(a+) We obtain the following separable equation in the varables z and t 1-sin and use cos...
2. Potential Inside a Sphere We are interested in the electric potential inside a spherical shell that is radius a and centered on the origin. There are no charges inside the she, so the potential satisfies the Laplace equation, However, there is an external voltage applied to the surface of the shell which holds the potential on the surface to a value which depends on θ: As a result, the potential Ф(r,0) -by symmetry, it does not depend on ф-is...
Fritz John PDE 4th edition
Section 8 p. 25 thanks
solution (4,4) of (8.3a,b). We assume that we are given a special solution Po 9. of h'(50) - Pof'(50) +908'(so), F(XoYo20P,90)=0 (8.4) such that A-f'(so)F, (*080, 203P090) - 8'(50)F, (XoYo»20P0,90)+0. (8.5) Q. Prove that there exist unique functions solve (8.4) under the condition of (8.5). such that h'(s)=º(s) f'(s)+4(s)8'(s) (8.3a) F(f(s),8(s), h(s),+(s),4(s))=0. (8.35) Since equation (8.3b) is nonlinear there may be one, or several, or no solution (0,4) of (8.3a,b)....
Problem 3. Consider the initial value problem w y sin() 0 Convert the system into a single 3rd order equation and solve resulting initial value problem via Laplace transform method. Express your answer in terms of w,y, z. Problem 4 Solve the above problem by applying Laplace transform to the whole system without transferring it to a single equation. Do you get the same answer as in problem1? (Hint: Denote W(s), Y (s), Z(s) to be Laplace transforms of w(t),...
solve the PDE
+u= at2 on 3 € (0,L), t > 0, with boundary conditions au 2x2 u(0,t) = 0, u(L, t) = 0 au and initial condition u(x,0) = f(x), at (x,0) = g(x) following the steps below. (a) Separate the variables and write differential equations for the functions (x) and h(t); pick the separation constant so that we recover a problem already studied. (b) Find the eigenfunctions and eigenvalues. (c) Write the general solution for this problem. (d)...
all parts, please
For this problem, we'll solve the 3D wave equation in a box. The Laplacian in 3 dimensions is a2 vu= a2 a2 ou + ay? U= and the wave equation is 22 a2 at24 = 1 (a) (3 Points) Use separation of variables with ur,y,z,t) = S(x, y, z)T(t) to get a spatial PDE and a temporal ODE for this problem, call the separation constant A. Show all your work! (b) (3 Points) The spatial equation should...
Problem 2.16 In this problem we explore some of the more useful theorems (stated without proof) involving Hermite polynomials. (a) The Rodrigues formula says that H (6) = (-1)” (1) . (2.87) Use it to derive H3 and H4. (b) The following recursion relation gives you Hn+1 in terms of the two preceding Hermite polynomials: Hn+1(E) = 2€ H, (E) – 2n Hn-1(5). (2.88) Use it, together with your answer in (a), to obtain Hg and H. (c) If you...
Problem 1: We are interested in solving a modified form of diffusion equation given below using Fourier transforms au(x,t) The domain of the problem is-oo < x < oo and is 0 < t < oo . At time t = 0, the initial condition is given by u (x,0)-0 a) Take the Fourier transform on x and show that the above PDE can be transformed into the following ODE where G() is the Fourier transform of g(x) and U(w,...
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