1. The problem statement, all variables and given/known data Emma and Don are playing in a band. While emma is marching toward Don, Don tunes his instrument to match the note that emma is playing. When emma stops, don immediately notices a beat frequency of 5 Hz. If the speed of the sound is 330m/s what is the relationship between Emmas speed and the frequency she is emmiting? 2. Relevant equations fobs=f0[(v)/(v+-vsource)] Bear Frequency= |f2-f1| v=ƒλ 3. The attempt at a solution at the speed which emma is moving, her note due to the doppler effect is shifted to a higher pitch which is what don tunes his instrument too. when she stops, the frequency of emmas note drops by 5Hz, to the actual note which was truly being played. Thats all i understand... whats the best way to get started?