2. Consider the following partial differential equation (a) Separate this equation into two ordin...
(a) Use separation of variables to rewrite the partial differential equation below into a pair 1. of ordinary differential equations. (b) Suppose the above partial differential equation has boundary condition uz (0,t) 0, u(20, t)0. Use separations of variables to determine the corresponding bound- ary conditions that the ordinary differential equations found in (a) must satisfy. (c) (Yes or no) Could the partial differential equation, u -2uzt-5utt, be separated into two ordinary differential equations? (a) Use separation of variables to...
1. (10 points, part I) Consider the following initial boundary value problem lU (la) (1b) (1c) 0L, t> 0 3 cos ( a(x, 0) (a) Classify the partial differential equation (1a) (b) What do the equations (la)-(1c) model? (Hint: Give an interpretation for the PDE, boundary conditions and intial condition.) c) Use the method of separation of variables to separate the above problem into two sub- problems (one that depends on space and the other only on time) (d) What...
The function u(x, t) satisfies the partial differential equation with the boundary conditions u(0,t) = 0 , u(1,t) = 0 and the initial condition u(x,0) = f(x) = 2x if 0<x<} 2(1 – x) if}<x< 1 . The initial velocity is zero. Answer the following questions. (1) Obtain two ODES (Ordinary Differential Equations) by the method of separation of variables and separating variable -k? (2) Find u(x, t) as an infinite series satisfying the boundary condition and the initial condition.
P3.* Consider the ordinary differential equation: u” + 1 = 0. a) Show that this equation together with the boundary conditions u(0) = 2, u(a) = 0 has no solution. b) Show that this equation together with the boundary conditions u(0) = 2, u(a) = –2 has infinitely many solutions.
Consider the partial differential equation together with the boundary conditions u(0, t) 0 and u(1,t)0 for t20 and the initial condition u(z,0) = z(1-2) for 0 < x < 1. (a) If n is a positive integer, show that the function , sin(x), satisfies the given partial differential equation and boundary conditions. (b) The general solution of the partial differential equation that satisfies the boundary conditions is Write down (but do not evaluate) an integral that can be used to...
One end of the pipe is closed, which corresponds to the boundary conditionu(0, t) = 0, for t > 0. The other end of the pipe is open, which correspondsto the boundary condition ux(L, t) = 0, for t > 0.(a) Suppose that µ < 0, so µ = −k^2 for some k > 0. Find the non-trivial solution X(x) that satisfies equations (3), stating clearly what values k is allowed to take.(b) Write down the general solution of equation...
Question 3. Separation of variables. Consider Laplace's Equation in two dimensions: (a) Write Φ(x,y) F(x)G(y) and use separation of variables to get ordinary differential equa- tions for F and G (b) Consider the rectangular region {(x,y) є R2 : 0 a, 0-y-b} with three boundary x conditions on Ф: obtain conditions on F and G on those boundaries where conditions on Ф are given. (c) (i) Solve the differential equations found in (a), subject to the conditions found in (b)...
Question 3. Separation of variables Consider Laplace's Equation in two dimensions (a) Write Ф(r,y)-F(x)G(y) and use separation of variables to get ordinary differential equa- tions for F and G (b) Consider the rectangular region {(x, y) E R2: 0Ka, 0 y b with three boundary conditions on Ф об obtain conditions on F and G on those boundaries where conditions on Ф are given (c) (i) Solve the differential equations found in (a), subject to the conditions found in (b)...
4. (5 marks) Consider the partial differential equation (1) for 1 € (0,2) and t > 0, with boundary conditions u(0, 1) = 0 ur(2, 1) = 0. Which of the following are solutions to the PDE and boundary conditions? In each case explain your answer. Note that initial conditions are not given. (Hint: it is not necessary to solve the problem above. (a) -3)*** e ular, 1) = Žen sin [(---) --] ~[(---) ;-)e-(1-1) e+(1-3)*(/2°1 u(3,t) - Cu COS...
4. (50 pts) Consider the following partial differential equation: 1du au Ət22 Ətər2 (BC) u7,t) = 0 20,t) = 0 0 <t (IC) u(3,0) = 0 0 <r <a Follow the steps below to solve it: (a) (8 pts) Separate variables as u(x,t) = X(2)T(t) to derive the following differential equations for X and T, with an unknown parameter 1: T" - T' + XT = 0, X" + 1X = 0.