Trucks 1 and 2 each have a siren emitting a pure tone of606 Hz. Truck 1 remains stationary and truck 2 moves at14.1 m/s toward the observer as shown in the diagram. Thespeed of sound is 340 m/s. The observer must run at aspeed ofm/s (along a line segment connecting thetrucks, although direction right or left is not given) to makethe observed beat frequency become zero?D옷+2

Answered: Image /qna-images/answer/ebb0d5c9-d03b-475d-8baa-7b1f50384f4a.jpg

Answered: Trucks 1 and 2 each have a siren…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A spherical wave with a wavelength of 4.1 m is emitted from the origin. At one instant of time, the phase at x1 = 5.1 m is ?1ϕ1= ?π rad. At that instant, what is the phase (In radians) at x2 = 4 m?
Two flute players are playing notes on slightly different flutes. Flute A is a narrow tube, open on both ends, and is 0.4 m long. Flute B is similar, except it is 0.38 m long. Assume that the speed of sound is 343 m/s. (a) What is the beat frequency when the two flutes are played together? Explain. (b) How should flute B be moved (i.e., speed and direction), if we want to eliminate the beat? Is this a reasonable way to put the two flutes in tune with each other? Explain.
Two trains on separate tracks move toward one another. Train 1 has a speed of 120 km/h, train 2 a speed of 65.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Assume the speed of sound is 345 m/s.) Hz
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A train is moving parallel and adjacent toa highway with a constant speed of 34 m/s.A car is traveling in the same direction as thetrain at 65 m/s. The train’s whistle sounds at380 Hz.When the car is behind the train what frequency does an occupant of the car observefor the train whistle? The speed of sound is343 m/s.Answer in units of Hz
A student holds a tuning fork oscillating at 256 Hz. He walks toward a wall at a constant speed of 1.45 m/s. (a) What beat frequency does he observe between the tuning fork and its echo? 0.08 x Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. Hz (b) How fast must he walk away from the wall to observe a beat frequency of 5.60 Hz? 5.60 X Your response differs from the correct answer by more than 10%. Double check your calculations. m/s
You are driving west on a highway at 2o m/sec. A police car is traveling toward you moving east. The police siren is blaring loudly and your perfect pitch identifies the tone frequency as 600 HZ but you know that the standard siren frequency is 500 HZ. (use 340 m/sec as the speed of sound in the air) How fast must the police car be moving to give this much change in the perceived frequency? After the police car goes by you if you maintain your respective speeds and direction, what will be the frequency you here as he recedes from you?
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Two timpani (tunable drums) are played at the same time. One is correctly turned so that when it is struck, sound is produced that has a wavelength of 2.20m. If the speed of sound is 343m/s, what beat frequency is heard?
Two motors sitting near each other in a factory at slightly different rates. One runs at 805.0 rpm and the other at 775.0 rpm. You hear the combined sound intensity from the motors increase and then decrease periodically due to wave interference. What is the period of beats in seconds?
A 16-kg object hangs in equilibrium from a string of total length L = 5.0 m and linear mass density = 0.0028 kg/m. The string is wrapped around two light, frictionless pulleys that are separated by the distance d = 2.0 m (Fig. a). (a) Determine the tension in the string. N (b) (b) At what frequency must the string between the pulleys vibrate in order to form the standing-wave pattern shown in Figure (b)? Hz
A progressive wave travelling in the x-direction is represented by the following equation: ?=?sin(??−??)y=Asin⁡(Bt−Cx). Given that parameters ?A, ?B and ?C are given in SI units calculate the velocity of the wave for ?=50A=50 , ?=B= 2058 and ?=C= 30.

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