Question 19 (4 points) A car moving at 20.0 m/s (about 45 mph) on a mountain road. The driver of the car beeps his horn

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Question 19 4 Points A Car Moving At 20 0 M S About 45 Mph On A Mountain Road The Driver Of The Car Beeps His Horn 1 (44.16 KiB) Viewed 30 times

Question 19 (4 points) A car moving at 20.0 m/s (about 45 mph) on a mountain road. The driver of the car beeps his horn emitting a monotonic sound of frequency of 512 Hz. A fourth car is in the opposite lane driving towards the first car at 20.0 m/s. What frequency does the driver in the fourth car hears? Let Vair = 343 m/s. Your Answer: Answer Question 20 (5 points) A 0.717-g guitar string is 0.629 m long. The string is under a tension of 73.9-N. What is the frequency of the 4.0th harmonics in Hz? Your Answer: units Answer units Question 21 (5 points) A 0.717-g guitar string is 0.629 m long. The string is under a tension of 73.9-N. What is the wavelength of the 6th harmonics in m? Your Answer: