A Harmonic Longitudinal Wave Propagating Down a Tube Filled with a Compressible

Multiple Choice

A harmonic longitudinal wave propagating down a tube filled with a compressible gas has the form s(x, t) = sm cos (kx - $\omega$ t) . Its velocity can be obtained from:

A) ( $\omega$ /k)
B) k/ $\omega$
C) k
D) ( $\omega$ )
E) ( $\omega$ k)