If a sound with frequency fs is produced by a source traveling along a line with speed vs. If an observer is traveling with speed v along the same line from the opposite direction toward the source, then the frequency of the sound heard by the observer is = (c+vo)rs fo = where c is the speed of sound, about 332 m/s. (This is the Doppler effect.) Suppose that, at a particular moment, you are in a train traveling at 42 m/s and accelerating at 1.6 m/s². A train is approaching you from the opposite direction on the other track at 47 m/s, accelerating at 1.7 m/s2, and sounds its whistle, which has a frequency of 438 Hz. At that instant, what is the perceived frequency that you hear? (Round your answer to one decimal place.) 580.7 X Hz How fast is it changing? (Round your answer to two decimal places.) X Hz/s 5.90

If a sound with frequency fs is produced by a source traveling along a line with speed vs. If an observer is traveling with speed v along the same line from the opposite direction toward the source, then the frequency of the sound heard by the observer is = (c+vo)rs fo = where c is the speed of sound, about 332 m/s. (This is the Doppler effect.) Suppose that, at a particular moment, you are in a train traveling at 42 m/s and accelerating at 1.6 m/s². A train is approaching you from the opposite direction on the other track at 47 m/s, accelerating at 1.7 m/s2, and sounds its whistle, which has a frequency of 438 Hz. At that instant, what is the perceived frequency that you hear? (Round your answer to one decimal place.) 580.7 X Hz How fast is it changing? (Round your answer to two decimal places.) X Hz/s 5.90