On a local road, there are a Honda moving at 72 km/h and a Porsche moving at 90 km/h,approach each other. The driver of the Honda seeing the Porsche was excited, so he honked witha frequency of 650 Hz. If the speed of the sound waves in air is 350 m/s, then what is thefrequency of sound heard by the driver of the Porsche?Hint: In this case, we have a moving observer, moving toward the source; thus, for calculation,the velocity of the observer, Vobs should be positive.

Q. Given that Velocity of source ( Honda) vs = 72 km / h Velocity of observer ( Porsche) vo = 90 km…

Answered: On a local road, there are a Honda…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter14: Superposition And Standing Waves

Section: Chapter Questions

Problem 50P

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Student A runs after Student B. Student A carries a tuning fork ringing at 1024 Hz, and student B carries a tuning fork ringing at 1000 Hz. Student A is running at a speed of vA=5.00 m/s and Student B is running at vB=6.00 m/s. What is the beat frequency heard by each student? The speed of sound is v=343.00 m/s.
An airplane is flying at Mach 1.50 at an altitude of 7500.00 meters, where the speed of sound is v=343.00 m/s. How far away from a stationary observer will the plane be when the observer hears the sonic boom?
Consider two sinusoidal waves traveling along a string, modeled as y1(x,t)=0.3msin(4m1x+3s1t) and y2(x,t)=0.6msin(8m1x6s1t) . What is the height of the resultant wave formed by the interference of the two waves at the position x=0.5 m at time t=0.2 s?
During a 4th of July celebration, an M80 firework explodes on the ground, producing a bright flash and a loud bang. The air temperature of the night air is TF=90.00F . Two observers see the flash and hear the bang. The first observer notes the time between the flash and the bang as 1.00 second. The second observer notes the difference as 3.00 seconds. The line of sight between the two observers meet at a right angle as shown below. What is the distance x between the two observers?
You are driving down the street with your windows open enjoying the nice day. On this nice 20°C day, the velocity of sound in air is 343 m/s . You see a person sitting on a park bench and hear him whistling just after you drive by. If the person whistles at a frequency of 1450 Hz and you drive away at a speed of 17 m/s, what frequency of sound do you observe?
An elf is moving behind a Orc bard that is singing very loudly and triumphantly. If the Orc is singing at an average frequency of 377 Hz and joyously skipping forward at a speed of 9.3 m/s, how fast would the elf have to be moving and in what direction for the frequency to be heard as 359 Hz? Take the speed of sound to be 340 m/s.
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 459 Hz when the train is approaching him and 434 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find? (Assume the speed of sound in air is 343 m/s.)
A Truck is traveling at 40 m/s and sounding a siren with 800 Hz when approaching to a car heading towards truck with speed of 1000 cm/s. At what frequency does the driver of the car hear the siren? (Assume a temperature of 20° C and the speed of sound wave in air at this temperature is 343 m/s.)
Two trains A and B, beep simultaneously with a frequency of 392 Hz. Train A is in rest and train B moves away from train A at a speed of 35 m/s. A listener is among the two trains and moves following train B with a speed of 15 m/s. adopt the speed of sound in air as v = 342 m/s. There is no wind.a) What is the frequency that the listener hears from train B?b) What is the frequency of beats that the listener hears?
What are the frequency and wavelength of the waves produced in the air when the string with one fixed end is vibrating at its fundamental frequency? The speed of the sound in air at 20°C is 344m/s.
A train moving east at a velocity of 20 m/s emits a whistle at a frequency of348 Hz. Another train, farther up the track and moving east at a velocity of30 m/s, hears the whistle from the first train. (a) If the speed of sound in airis 343 m/s, what is the frequency of the sound heard by the second trainengineer? (b) What is the frequency of the echo heard by the first trainengineer coming off the second train?
Two trains approach each other, each train traveling at 30 m/s. The engineer on one train sounds his horn which has a frequency of 177Hz. What frequency does a passenger on the second train hear? Use 340 m/s for the speed of sound in air

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