1. While snorkeling you hear a dolphin’s sound as it approaches at 5.00 m/s. If the perceived frequency is 850 Hz, what is the actual frequency being emitted?
2. Two construction workers stand 112 m apart. One strikes a steel beam with a hammer. How long does it take for the other to hear the sound? Assume the velocity of sound in air is 345 m/s.
3. What is the length of a brass pipe through which a sound wave is transmitted in 0.136 s?