a) Two loudspeakers are placed 18.00 m away from each other and driven by the same source at a frequency of 514.5 Hz. An observer stands 8.00 m in front of the speakers at the point O, at the same distance from each speaker. What minimum distance should the right speaker be moved to create destructive interference at point O?
B) as you get closer, you notice that it is GODZILLA!! and he sees you! and begins to come after you!! if you are now moving away at 15 m/s, and GODZILLA is chasing you at 30 m/s, what is the new frequency you detect from GODZILLA!?