(1) Consider the following BVP for the wave equation, which models a string that is free...
(1) Consider the following BVP for the wave equation, which models a string that is free at both ends: (r, t) E (0, L) x (0, 0o) (0, t) ur(L, t) u(r, 0) f() u(r, 0) g() 0 t0 E [0, L E [0, L The total energy of the solution at time t is 1 E(t) 2 0 (au (r, t) +(u(T, t)? ds. Show that the total energy is constant, i.c., E'(t) 0. [Hint: Start by differentiating under...
(3) Solve the following BVP for the Wave Equation using the Fourier Series solution formulac (3a2 u(r, t) 0 u(0, t)0 u(T, t) 0 u(r, 0) sin(x)2sin(4r) 3sin(8r) (r, 0) 10sin(2x)20sin (3r)- 30sin (5r) (r, t) E (0, ) x (0, 0o) t >0 t > 0 1
(3) Solve the following BVP for the Wave Equation using the Fourier Series solution formulac (3a2 u(r, t) 0 u(0, t)0 u(T, t) 0 u(r, 0) sin(x)2sin(4r) 3sin(8r) (r, 0) 10sin(2x)20sin (3r)-...
(2) Solve the following BVP for the Wave Equation using the Fourier Serics solution formulac (42- u(r, t)= 0 u(0, t) 0 u(5, t) 0 u(r, 0) sin(T) 12sin(T) ut(r, 0)0 (r, t) E (0,5) x (0, oo) t > 0 t > 0
(2) Solve the following BVP for the Wave Equation using the Fourier Serics solution formulac (42- u(r, t)= 0 u(0, t) 0 u(5, t) 0 u(r, 0) sin(T) 12sin(T) ut(r, 0)0 (r, t) E (0,5) x...
A uniform string of length L = 1 is described by the one-dimensional wave equation au dt2 dx where u(x,t) is the displacement. At the initial moment t = 0, the displacement is u(x,0) = sin(Tt x), and the velocity of the string is zero. (Here n = 3.14159.) Find the displacement of the string at point x = 1/2 at time t = 2.7.
(The wave equation) Consider a string with fixed zero ends of length L with speed parameter c, with initial position -X u(x,0) = x € (0, L/2] c [L/2, L] C L and zero initial velocity. (a) Find the normal modes of the solution and specify the spatial and temporal frequencies for each. (You do not need to derive the general solution to the wave equation with fixed ends.) (b) Describe how the tension Th, density p and length L...
2. Consider the following initial value problem for the wave equation, modeling a vi- brating string with fixed endpoints. au = 922 u u(t,0) = u(t, 7) = 0 u(0,x) = 8 sin(x) sin(2x) sin(3x) (Ou(0,2) = 9 sin(6x) (a) What is the length L of the string? What is the value of the constant c= T/p? (b) Write down the solution of this initial value problem. (Hint: You might find the following identities helpful.)! cos(a + b) = cos...
parts a,b, c
Problem 1. Consider the vibration of a string with two ends fixed. In addition, assume that the string is initially at rest. The initial boundary value problem (IBVP) is written as u(0,t) -u(1,t) u(x,0) = f(x), 0 ut (z, 0-0, 0 < x < 1. The solution of this IBVP using the method of separation of variables is given by n-l a) Find the coefficients bn. b) Show that this wave function can be written as the...
(1) Find the solution for each of the following BVP for the heat equation at)u(r, t)0 (r, t) E (0, 20) x (0, co) (0, t) 0 u(20, t)0 u(r, 0) f(r) E [0, 10 E (10, 20 t > 0 1 where f(r) a. t > 0
(1) Find the solution for each of the following BVP for the heat equation at)u(r, t)0 (r, t) E (0, 20) x (0, co) (0, t) 0 u(20, t)0 u(r, 0) f(r)...
Problem 6: Consider the wave equation with a dumping term r > 0, Cut-ºu a + rau, = 0, (t, z) & IR2. This corresponds to the vibrations of an infinite string in a medium that resists its motion (e.g., air or water). Let the energy of the string be given by 1 E() F1 / [u?(t, x) + uş(t, x)) dr. -00 Show that E(t) decreases but E(t)e2rt increases, i.e., the string loses energy due to resistance but does...
please
solve B? and C)
The total energy for the vibrating string problem can be written as E = Kinetic Energy + Potential Energy = dx. Consider the case where u(r, t) satisfies the wave equation with the boundary con ditions ux(0,t) 4(L, t)-0. (a) Show that E is constant in time (b) Calculate the energy in 1 mode. (c) Show that the total energy is the sum of the energies contained in each mode