1. A piano tuner stretches a steel plano wire with a tension of 600 N. The wire is m long and has a mass of kg.
a. What is the speed of a transverse wave on the wire?
b. What are the wavelangth and frequency of the fundamental tone?
2. A police siren emits a wave with frequency fs =250 Hz. The speed of sound is 340m/s.
a. If the listener is at rest and siren is moving away from the listener at 40m/s, what frequency does the listener bear?
b. If the siren u at rest and the listener it in a car moving away from the siren at 40 m/s. what frequency does the listener hear?