1. The problem statement, all variables and given/known data A source emits sound with a frequency of 860 Hz. It is moving at 20.0 m/s toward a stationary reflecting wall. If the speed of sound is 343 m/s, what frequency does an observer riding with the source hear? A 860 Hz B 913 Hz C 910 Hz D 765 Hz E 967 Hz 2. Relevant equations WHERE FL and vL are the frequency and velocity of sound heard by the personL fs and vs are the frequency and velocity of sound emmited by the source 3. The attempt at a solution: v=343 m/sec vs=20 m/sec vL=-vs=-20 m/sec since if it is moving away from the source fs=860Hz then using the aboove equation FL=860Hz=Fs but it is incorrect? Why?