Two train whistles, A and B, each have a frequency of 404 Hz. A is stationary and B is moving toward the right (awayfrom A) at a speed of 35.0 m/s. A listener is between the two whistles and is moving toward the right with a speed of 15.0m/s as shown in (Figure 1).Figure▾Part AVB = 35.0 m/sVA = 0V₁ = 15.0 m/sWhat is the frequency from A as heard by the listener?Express your answer in hertz.ΜΕ ΑΣΦ-421.67?HzYou have already submitted this answer. Enter a new answer.No credit lost. Try again.SubmitPrevious Answers Request AnswerPart BWhat is the frequency from B as heard by the listener?Express your answer in hertz.ΜΕ ΑΣΦf2 =?HzB1 of 1 Part CWhat is the beat frequency detected by the listener?Express your answer in hertz.fbeat = 47.92ΑΣΦSubmit Previous Answers Request Answer× Incorrect; Try Again?Hz

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Answered: Two train whistles, A and B, each have…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter2: One Dimensional Motion

Section: Chapter Questions

Problem 25PQ: During a thunderstorm, a frightened child is soothed by learning to estimate the distance to a...

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During a thunderstorm, a frightened child is soothed by learning to estimate the distance to a lightning strike by counting the time between seeing the lightning and hearing the thunder (Fig. P2.25). The speed vs of sound in air depends on the air temperature, but assume the value is 343 m/s. The speed of light c is 3.00 108 m/s. a. A child sees the lightning and then counts to eight slowly before hearing the thunder. Assume the light travel time is negligible. Estimate the distance to the lightning strike. b. Using your estimate in part (a), find the light travel time. Is it fair to neglect the light travel time? c. Think about how time was measured in this problem. Is it fair to neglect the difference between the speed of sound in cold air (vs at 0C = 331.4 m/s) and the speed of sound in very warm air (vs at 40C = 355.4 m/s)?
A bat flying at 4.65 m/s is chasing an insect flying in the same direction. The bat emits a 39.9-kHz chirp and receives back an echo at 40.6 kHz. (Take the speed of sound in air to be v = 343 m/s.) (a) What is the speed of the insect? m/s(b) Will the bat be able to catch the insect? YesNo Explain.
A bat flying at 5.05 m/s is chasing an insect flying in the same direction. The bat emits a 39.8-kHz chirp and receives back an echo at 40.6 kHz. (Take the speed of sound in air to be v = 343 m/s.) (a) What is the speed of the insect? m/s(b) Will the bat be able to catch the insect? Yes No Explain.
A spaceship is approaching a space station at a speed of 1.60 ✕ 105 m/s. The space station has a beacon that emits green light with a frequency of 5.94 ✕ 1014 Hz. (a) What is the frequency of the beacon observed on the spaceship? (Use c = 2.9979 ✕ 108 m/s for the speed of light. Enter your answer to at least five significant figures.)answer in Hz
On a 20°C°C night, a bat hovering in the air emits an ultrasonic chirp that has a frequency of 45 kHzkHz. It hears an echo 60 msms later. Suppose the object is an insect flying straight away from the bat. What is the insect's speed if the ultrasonic echo is shifted down in frequency by 750 Hz?
If a stationary dolphin emits a call at a sound frequency of 53 kHz. The sound wave reflects off a fish moving directly towards the dolphin. And the sound wave echo returns at a frequency of 55 kHz. What is the speed of the fish? The speed of sound is 343 m/s.
Microwaves travel at the speed of light, 3.00 ✕ 108 m/s. When the frequency of microwaves is 7.00 ✕ 109 Hz, what is their wavelength? m
Chapter 17, Problem 059 SN x Incorrect. A French submarine and a U.S. submarine move toward each other during maneuvers in motionless water in the North Atlantic (see the figure). The French sub moves at speed vF, and the U.S. sub at speed vus. The French sub sends out a sonar signal (sound wave in water) at frequency f. Sonar waves travel at speed v. (a) What is the signal's frequency as detected by the U.S. sub? (b) What frequency is detected by the French sub in the signal reflected back to it by the U.S. sub? State your answers in terms of the given variables. French U.S. VF VUS (a) fus = レーV」 v+Vf (b) fr = f ..
There was an accident, and NASA engineers are trying to sort out where two of their Mars Rovers, Tango and Foxtrot, have landed. The engineers know that landing site A is much hotter than landing site B. Unfortunately, the only working sensors on Tango and Foxtrot measure the speed of sound. If Tango measures the speed of sound at its landing site as 240 m/s, while Foxtrot measures speed of sound as 258 m/s at its landing site, where has each rover landed?
A spaceship is approaching a space station at a speed of 3.40 x 105 m/s. The space station has a beacon that emits green light with a frequency of 5.93 x 1014 Hz. (a) What is the frequency of the beacon observed on the spaceship? (Use c = 2.9979 x 108 m/s for the speed of light. Enter your answer to at least five significant figures.) Hz (b) What is the change in frequency? Hz
There was an accident and NASA engineers are trying to sort out where two of their Mars Rovers (named 'Tango' and 'Foxtrot') have landed. The engineers know that landing site A is much hotter than landing site B. Unfortunately, the only working sensors on Tango and Foxtrot measure the speed of sound. If Tango measures the speed of sound at its landing site as 240 m/s, while Foxtrot measures speed of sound as 258 m/s at its landing site, where has each rover landed? Tango landed at site A while Foxtrot landed at site B. Tango landed at site B while Foxtrot landed at site A. Both Tango and Foxtrot landed at site A. O Both Tango and Foxtrot landed at site B.
Chapter 17, Problem 059 SN A French submarine and a U.S. submarine move toward each other during maneuvers in motionless water in the North Atlantic (see the figure). The French sub moves at speed ve , and the U.S. sub at speed vus- The French sub sends out a sonar signal (sound wave in water) at frequency f. Sonar waves travel at speed v. (a) What is the signal's frequency as detected by the U.S. sub? (b) What frequency is detected by the French sub in the signal reflected back to it by the U.S. sub? State your answers in terms of the given variables. French U.S. VF V US (a) fus = 2 Edit (b) ff = 2Edit

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