Chapter 14, Problem 97GP

Two ships in a heavy fog are blowing their horns, both of which produce sound with a frequency of 175.0 Hz (Figure 14-53). One ship is at rest; the other moves on a straight line that passes through the one at rest. If people on the stationary ship hear a beat frequency of 3.5 Hz, what are the two possible speeds and directions of motion of the moving ship?

Figure 14-53 Problem 97