1. The problem statement, all variables and given/known data A speaker is attached to a wire 1.5 m long and is spun in a circle at 2 rev/s. The speaker is connected to an electric piano on which a child is playing a note at 261 Hz. Speed of sound in air is 343 m/s. What range of frequencies will the stationary observer hear? I converted rev/s to rad/s to get angular velocity, w=720.0027707 rad/s. Then, I converted this into linear velocity to match with the speed of sound, v/r = w, v = 1080.004156 m/s. Next I used the Doppler equation for a moving source, and got 198.0887291 and 382.4685762Hz, is this correct?