Part B: Doppler Effect v i vobserver fobserved = f 17 i \"source 3. Go to htt :l/ h sics.bu.edu/~du lHTMLS/do |er.htm|. The simulation at the bottom of the page allows you to alter the source velocity and observer velocity, for a source frequency off = 343 Hz and a sound speed of v = 343 m/s. Don't press Start yet. Using the doppler shift equation, predict the speed at which the observer would detect a frequency of 750 Hz as the source approached the observer. Also predict the observed frequency once the source passes the observer and begins receding from the observer at the same speed. 4. Set the source velocity to your predicted velocity and test your predictions. If they were not correct. go back and redo them. 5. If the source and observer are both moving toward each other at 55 mls, what frequency will they perceive? 6. Test your prediction from the previous step. Was it correct? If not, correct it. 7. Set the observer velocity to zero. Set the source velocity equal to the speed of sound What does the simulation report as the observed frequency? Use the doppler shift equation to explain this result. and explain in physical terms what would happen in the real world in this situation. What would the observer hear as the source passed them and why