The wave equation W 0 = 10%

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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The wave equation
1=10
may be studied by separation of variables: u(x, t) = X(x)T(t).
If(x) = -k²X(x), what is the ODE obeyed by T(t)? []
Which of the following solutions obey the boundary conditions X(0) = 0 and X (L) = 0? [tick all that are correct
□sin() for & integer sin()
sin(
(2k+1)mz
2L
) for k integer
□ sin(2) sin() □ sin()
Which of the following is a possible solution of the above wave equation?
○ cos(kx)e-ket O cos(kex) sin(kt) ○ Az + B ○ cos(kx) sin(kt) O None of the choices apply
Transcribed Image Text:The wave equation 1=10 may be studied by separation of variables: u(x, t) = X(x)T(t). If(x) = -k²X(x), what is the ODE obeyed by T(t)? [] Which of the following solutions obey the boundary conditions X(0) = 0 and X (L) = 0? [tick all that are correct □sin() for & integer sin() sin( (2k+1)mz 2L ) for k integer □ sin(2) sin() □ sin() Which of the following is a possible solution of the above wave equation? ○ cos(kx)e-ket O cos(kex) sin(kt) ○ Az + B ○ cos(kx) sin(kt) O None of the choices apply
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