Once you are comfortable using the Doppler Calculator, calculate the quantities required to complete the problems that appear below it. Doppler Calculator Doppler Calculator 0 fa = Solving for HZ rs = [:1 Hz V = m/s Vs: m/s Calculate A woman is sitting at a bus stop when an ambulance with a siren wailing at 430 Hz approaches at 29.5 m/s (about 66 mph). Assume the speed of sound to be 343 m/s. (a) What frequency (in Hz) does the woman hear? fa = Hz (b) With what speed V5 (in m/s) would the ambulance have to travel in order for the woman to hear the siren at an apparent frequency of fa = 451 Hz? vS = m/s (c) What frequency (in Hz) would the woman hear if the siren moved away from her with the same speed you found in part (b)? fa = Hz