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1. A sonar echo returns to a submarine 0.7 s after being emitted. What is the...

1. A sonar echo returns to a submarine 0.7 s after being emitted. What is the distance to the object creating the echo? (Assume that the submarine is in sea water, and therefore, vw ≈ 1,522 m/s.)

2. If a wind instrument, such as a tuba, has a fundamental frequency of 35.4 Hz, what is its fifth overtone? It is closed at one end and the speed of sound is 337 m/s.

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