A harmonic pressure wave produced by a distant source is
Chapter , Problem 80(choose chapter or problem)
A harmonic pressure wave produced by a distant source is traveling through your vicinity, and the wavefronts that travel through your vicinity are vertical planes. Let the direction be to the east and the direction be toward the north. The wave function for the wave is Show that the direction in which the wave is traveling makes an angle with the direction and that the wave speed is
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