The sound source of a ship's sonar system operates at a frequency of 27.0 kHz . The speed of sound in water (assumed to be at a uniform 20C) is 1482 m/s . The ship is at rest in the water.

Part A

What is the wavelength of the waves emitted by the source?

Express your answer with the appropriate units.

Part B

What is the difference in frequency between the waves reflected from a whale traveling directly toward the ship at 4.95 m/s and the directly radiated waves?

Express your answer with the appropriate units.

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