15. Consider the initial value problem Ut + uur = 0, IER, t > 0, S...
clear writing please and thank you Problem 2. Given the PDE ut + uy = u? u(3,0) = g(x) for IER, >0, for ER. (a) Sketch the characteristic curve that passes through P(2,3) in the xt-plane. Find u(2,3) without using the exact solution ulit, t). (b) Use the method of characteristics to find the solution u(, t).
4. [10] Find the solution to given initial-boundary value problem: 4uxx = ut 0<x<TI, t> 0 u(0,t) = 5, uit, t) = 10, t> 0 u(x,0) = sin 3x - sin 5x, 0<x<T
5. (20 pts). Solve the following initial-value problem: Ut + 2uuz - 0<x<, 0 <t<oo 0 1 <1 > 1 u(t,0) = Then draw the solution for different values of time.
PDE question Consider the one dimensional wave equation on the half line: Ut(x,0) = g(x) Utt - Uzx= 0 0 < < u(0,t) = 0 u(x,0) = f(x) (a) What is the solution? (b) For the particular initial conditions 12 - 2 25254 f(x) = { 6- 4<r<6 otherwise g(x) = 0 sketch the solution u(x, t) for t = 0, 2, 4, 6.
4. (10 points) Find the solution to the wave problem Ut = c+421 +COSI, <0, t>0, with initial conditions u(1,0) = sin r, 4(1,0) = 1+I.
Find a formula for the solution of the initial value problem for for t>0, -oc < x < oo ut = uzz-u a(1:0) = g(z) -x < 1 < x where g is continuous and bounded.( Hint: use v(x, t) = et u(z. t).) Find a formula for the solution of the initial value problem for for t>0, -oc
Problem 5: Consider the initial value / Dirichlet problem ut(t, x) – 2uzz(t, x) = et, (t, x) € (0, +00)?, u(0, 2) = 1, u(t,0) = e- For the unique solution u(x, t) find the following limit as a function of t: (8 points) lim u(x, t). 2+
Problem 5: Consider the initial value Dirichlet problem ut(t, x) – 2uxx(t, x) = et, (t, x) € (0, +00)?, u(0,x) = 1, u(t,0) = e- For the unique solution u(x, t) find the following limit as a function of t: (8 points) lim u2, t). +00
9. Solve the wave equation subject to the boundary and initial conditions u(0,t) = 0, u(x,0) = 0, U(TT, t) = 0, t> 0 $ (3,0) = sin(x), 0<x<a
In Exercises 1-15 solve the initial-boundary value problem. In some of these exercises, Theorem 11.3.5(b) or Exercise 11.3.35 will simplify the computation of the coefficients in the Fourier sine series. 8. Cutt 64uzz, 0<<<3, t> 0, u(0, 1) = 0, ta(3, 1) = 0, t> 0, u(x,0)=0, ut(3,0) = (x2 – 9), 0 < x <3