14. THE DOPPLER EFFECT Enter data from the lab below: speed of sound, c in air at 25 C is m/s frequency of source, f hertz approaching the observer f hertz receding from observer S hertz C 1 or f = frequency of source f = frequency of observer c=speed of sound v = velocity of source (remember the velocity of a receding source is negative) Answer the questions based on data from the lab. V 1) Calculate the approaching velocity of the car. m/'s V 2) Calculate the receding velocity of the car. n/'s 3) Is the receding velocity the same as the approaching velocity? 4) Convert the velocity of the car to miles per hour. (1 mile/hour = 0.45 meters/sec) miles/hour 5) As seen in the video, does this speed of the car seem reasonable? If not, you may want to check your calculations. 6) If a star is moving away from the earth, would its light appear to shift toward the red or the blue? Why