A police man on duty detects a drop in the pitch of the horn of a motor car as it crosses him with a velocity 17.3 m/s. If the velocity of sound is 330m/s, calculate % of drop in the speed of the car? 5% O 20% O None of these O 15% O 10% O
Q: A bat flying at 4.55 m/s is chasing an insect flying in the same direction. The bat emits a 39.9-kHz…
A: Here first we will calculate the frequency the insect hear and then the frequency of reflected the…
Q: An observer on the railway platform observed that as a train passed through the station at 90 km/hr,…
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Q: A group of hikers hears an echo 2.80 s after shouting. How far away is the mountain that reflected…
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Q: Picnickers see a lightning flash and hear the resulting thunder 7.8 s later. If the storm is…
A: Speed is given by, V=dt...................(1) Where, V=velocity d=distance…
Q: A supersonic jet traveling at Mach 2.00 at an altitude of h = 21,000 m is directly over a person at…
A: speed of jet= 2 Mach altitude= 21 km speed of sound= 335 m/s Let x= distance travelled by plane when…
Q: You see lightning strike a mountaintop, and 2.90 s later you hear the accompanying thunder. How far…
A: Given: The time interval between seeing the lightning and hearing the thunder: ∆t = 2.90 s. The…
Q: During a thunderstorm, 5.0 s elapses between observing a lightning flash and hearing the resulting…
A: The speed of light (u) = 3 ×108 msThe speed of sound in air (v) = 344 msLet the distance of the…
Q: Picnickers see a lightning flash and hear the resulting thunder 8.6 s later. If the storm is…
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Q: A group of hikers hears an echo 3.20 s after shouting. How far away is the mountain that reflected…
A: Given, time (t) = 3.20 s speed of sound (v) = 346 m/s The sound pulse emitted by the…
Q: person stands at a point 300.001 m in front of the face of a sheer cliff. If the person shouts, how…
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Q: Picnickers see a lightning flash and hear the resulting thunder 9.50 s later. If the storm is…
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Q: A group of hikers hears an echo 1.60 s after shouting. How far away is the mountain that reflected…
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Q: You see condensed steam expelled from a ship whistle 4.948 seconds before you hear the sound. If the…
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Q: A group of hikers hears an echo 4.20 s after shouting. How far away is the mountain that reflected…
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Q: (a) A soccer player kicks a rock horizontally off a 38 m high cliff into a pool of water. If the…
A: We are given height of cliff. We find the time taken by rock to reach the water which is same for…
Q: An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling…
A: Given, Distance traveled by sound in each medium = 136 m Speed of sound in air = 347 m/s Speed of…
Q: A bat flying in a cave emits a sound and receives its echo 0.09 s later. Find the distance to the…
A: The objective of this question is to find the distance to the wall of the cave using the time taken…
Q: On a workday, the average decibel level of a busy street is 70 dB, with 100 cars passing a given…
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Q: While rolling down a hill, you produce a pitch of 387 Hz while honking on your horn. A stationary…
A: Given information: The frequency of the horn (f0) = 387 Hz The combined frequency heard (Δf) = 49 Hz…
Q: An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling…
A: speed of sound in air = 346 msspeed of sound in water = 1400 msspeed of sound in handrail = 5480…
Q: Suppose you hear a clap of thunder 8.20 s after seeing the associated lightning strike. The speed of…
A: Given Data : The time difference between seeing the lightning thunder and hearing the soun d is…
Q: An air controller on an aircraft carrier sees a jet fly over 81 meters above her and she hears the…
A: Speed of the jet = (140/81)*344 m/s
Q: 4. An observer is standing on the platform of a railway station. A train goes through the station…
A: Speed of sound in air is Decrease in sound when the vehicle crosses the observer is Find:The speed…
Q: A group of hikers hears an echo 4.60 s after shouting. How far away is the mountain that reflected…
A:
Q: A supersonic jet traveling at Mach 2.80 at an altitude of h = 21,000 m is directly over a person at…
A: For a supersonic boom, the formula related to the Mach number is Sin θ =vtvst=vvs=1M Where vs source…
Q: how much time does it take for you to complete 12 dribbles?
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Q: A group of hikers hears an echo 1.30 s after shouting. How far away is the mountain that reflected…
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Q: As a racing car zooms by you, its pitch (frequency) decreases by 20%. If the speed of sound is 345…
A: The decrease in the frequency of the source as it moves away is 20%. i.e where,fo =…
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- A short blast is emitted somewhere beteeen two reflecting cliffs. Two echos are heard, once at 0.6 sec and the next at 0.9 sec. Given the speed of sound is 330 m/s, how far apart are the reflecting cliffs?An observer at sea level does not hear an aircraft flying at 6000-m standard altitude until 15 s after it has passed over head. Estimate the aircraft speed in m/s.Suppose you hear a clap of thunder 16.2 seconds after seeing the associated lightning stroke. The speed of the light is air is 300000000 m/s. How far are you from the lightning strike?
- A person stands at a point 380 m in front of the face of a sheer cliff. If the person shouts, how much time will elapse before an echo is heard? Assume the speed of sound is 344 m/sA group of hikers hears an echo 3.40 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 342 m/s.)There is a tube of length 1.0 m with one end closed. You clapped your hand at the mouth of the tube once. The echo of the clap came back after 6.0 milliseconds. What is the velocity of sound in the tube ? 330 m/s O 320 m/s 290 m/s O 170 m/s
- A person stands at a point 348 m in front of the face of a sheer cliff. If the person shouts, how much time will elapse before an echo is heard? (Assume the speed of sound is 344 m/s.)A bat, moving at 3 m/s, is chasing a flying insect. If the bat emits a 40-kHz chirp and receives back an echo at 40.7 kHz, at what speed is the insect moving? (Take the speed of sound in air to be v= 343 m/s.) State your answer to the nearest 0.01m/s. NOTE: Sign of your answer matters! Both of the speeds (insect's and bat's ) are measured with respect to the stagnant air.An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air, fresh water, and a slender metal handrail. The speeds of sound in air, water, and the handrail are 342, 1400, and 5140 m/s, respectively. The sound travels a distance of 136 m in each medium. (a) After the first sound arrives, how much later does the second sound arrive? (b) After the first sound arrives, how much later does the third sound arrive?
- Two cars are heading straight towards each other with the same speed. the horn of one sounds at a frequency of 3000 Hz but is beard by the driver of the other car as 3400 Hz. If the speed of sound is 340 m/s, find the speed of each car.During a thunderstorm, a 5.5 s difference between observing a lightening flash and hearing the resultant thunder. How far away in km and mi was the lightening flash? (The speed of sound is 344 m/s)What frequency of sound is observed if the 444 Hz source is traveling away from a stationary observer at a speed of 30.2 m/s? (assume the speed of sound in air is 343 m/s)