We stand in front of a wall. Between us and the wall, at the height of our ears, there is a whistleblowing, at a frequency of 600Hz. How fast must the whistle go towards the wall so that we can hear 3 beats per second?
Q: The horn of a train has a frequency of 375Hz. If the train is moving away from you at 38m/x, then…
A: Using Doppler effect, when the source is moving away from the person,
Q: Suppose a dolphin sends out a series of clicks that are reflected back from the bottom of the ocean…
A: Given:Distance covered by the sound to reach the bottom of the sea (d) = 55 mSpeed of sound in…
Q: You've entered the Great Space Race. Your engines are hearty enough to keep you in second place.…
A: Given Data: Original frequency f=6×1014 Hz If we consider our spaceship to be at rest relative to…
Q: A loudspeaker has a frequency of 1000Hz to 2000Hz. An open open pipe is near the loudspeaker. The…
A: Given f=1000-2000 Hz L=45.7cm v=344 m/s
Q: The speed of sound in steel is about 5,130 m/s. If a charge of dynamite is set off near a railroad…
A:
Q: A bat flying at 5.05 m/s is chasing an insect flying in the same direction. The bat emits a 39.8-kHz…
A: Given values: Speed of bat, vs=5.05 m/s Speed of sound in air, v=343 m/s Frequency of chirp emits by…
Q: The sound from a truck moving at 37m/s reflects from a cliff and is heard by an observer on the…
A: Given data: Speed of sound from truck is, vt=37 m/s. Initial wavelength of sound wave is, λ=0.15 m.…
Q: While running on the sidewalk at 5.2m/s, you hear an ambulance approaching you from behind. It is…
A:
Q: You are in a car moving at 90 km/h and you see someone at the side of the highway. You use your horn…
A:
Q: When poked by a spear, an operatic soprano lets out a 1200-Hz shriek. What is its wavelength if the…
A:
Q: A physics professor demonstrates the Doppler effect by tying a 580 HzHz sound generator to a…
A: The formula for Doppler Effect on the frequency, in case of stationary observer, can be written…
Q: Two aircraft engines are running at slightly different rates. One produces a sound of 826.0 Hz. The…
A: Given data: The frequencies of two aircraft engines f1 = 826.0 Hz f2 = 836.0 Hz Required: The…
Q: You see an approaching train while standing on a railway platform. It blows its whistle, which you…
A: Given: Frequency of the source train: fs=500 [Hz] Frequency heard by stationery observer: f0=100…
Q: A whistle you use to call your hunting dog has a frequency of 42 kHz, but your dog is ignoring it.…
A: Given: frequency, f = 42 Hz Apparent frequency, f' = 40 Hz
Q: Ben is walking in a park in a straight line at 1.2 m/s. A bird is hiding in a bush. When Ben is…
A: Given data : r1 = 2m I1 =10dB v=1.2m/s To Find : time upto which Ben will hear the bird (I2=0dB)
Q: AM radio signals are broadcast at frequencies between 550 kHz (kilohertz) and 1600 kHz and travel at…
A:
Q: Dolphins make sounds in air and water. What is the ratio of the wavelength of a sound in air to its…
A:
Q: A sound wave with a frequency of 50 Hz moves at a speed of around 350 m/s in air. It travels into a…
A:
Q: A train passes by a little boy at the depot.As it moves away from the boy at 65m/s, the whistle…
A:
Q: A jogger runs at 7 m/s, and is trailed by a bumblebee moving at 5 m/s and emitting a frequency of…
A:
Q: an ultrasonic scan uses the echo waves coming from something moving inside the body and the waves…
A: In an ultrasound scan, we can calculate the beat frequency using the Doppler effect formula for…
Q: The Cubs are putting on a fireworks show at Wrigley Field after the game on a brisk autumn evening…
A: Given: evening temperature = 12 0C(54 0F) Time taken by spectator to hear = 0.600 s speed of…
Q: Two loudspeakers emit 600 HzHz notes. One speaker sits on the ground. The other speaker is in the…
A:
Q: A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound.…
A: t = 0.345 sec T = 28.5 C speed of sound = 331 + 0.6T = 331 + 0.6*28.5= 331+17.1=348.1m/s
Q: You've entered the Great Space Race. Your engines are hearty enough to keep you in second place.…
A:
Q: You stand by the railroad tracks as a train passes by. You hear a 1 000-Hz frequency when the train…
A: Velocity of sound = 340m/s Frequency when train approaches =1000Hz Frequency when train goes away…
Q: An osprey (a type of hawk) has a distinct call: a whistle at 2100 Hz. An osprey calls while diving…
A: Frequency of whistle , fo = 2100 Hz Frequency of whistle heard , f= 2400 Hz Speed of sound , V = 343…
Q: You've entered the Great Space Race. Your engines are hearty enough to keep you in second place.…
A: Original frequency, f = 5.580 x 1014 Hz Velocity of source, v = 2609 km/s = 2609×10³ m/s Apparent…
Q: There was an accident and NASA engineers are trying to sort out where two of their Mars Rovers,…
A: Recall VαTSpeed of sound is proportional to square root of temperature.
Q: You are traveling at 38m/s toward oncoming car traveling at 28m/s toward you. Just before it reaches…
A:
Q: This is possibly a different atmosphere from ours. In any case, the speed of sound is…
A: When lightning flashes, we see its light first while its sound is heard after some time. This…
We stand in front of a wall. Between us and the wall, at the height of our ears, there is a whistleblowing, at a frequency of 600Hz. How fast must the whistle go towards the wall so that we can hear 3 beats per second?
Step by step
Solved in 4 steps with 4 images
- one way to tell if a mosquito is about to sting is to listen for the doppler shift as the mosquito is flying. the buzzing sound of a mosquito's wings is emmitted at a frequency of 1050 Hz. If you hear a frequency of 1034Hz, does this mean thatthe mosquito is coming in for a landing or that it has just bitten you and is flying away? At what velocity is the mosquito flying?A spectator at a parade receives an 888 Hz tone from an oncoming trumpeter who is playing an 881 Hz note. At what speed v., is the musician approaching if the speed of sound is 337 —? VS' m S 903 m S ! No, that's not the correct answer.A bicydist is traveling at t m/s towards a car at rest. if the dniver blows her horn at a frequency. of l627 Hz, what frequency in Hz does the bicyclist hear? Speed of Sound is 343 m/S
- I am onstage at the Met. Not singing, of course: I am a supernumerary, a silent extra. Suddenly, the lights go out! I hear Lise Davidson sing her 10000 Hz high note, but, oddly, she is 100 Hz sharp. Is Lise running away from me or toward me? At what speed?While sitting next to a road on a calm, warm 27.9ºC evening, you see an ambulance's lights flashing in the distance coming towards you. You hear a frequency of 140 Hz. However, you know that ambulances have sirens that emit sound at 130 Hz. How fast is the ambulance approaching you, in m/s?You've entered the Great Space Race. Your engines are hearty enough to keep you in second place. While racing, the person in front of you begins to have engine troubles and turns on his emergency lights that emit at a frequency of 5.640 x 1014 Hz. If the person in front of you is traveling 2627 km/s faster than you when he turns on his lights, what is the frequency of the emergency lights that you observe when it reaches you in your spaceship? (Enter your answer to four significant figures.) 4.0 Hz Additional Materials
- Going down the road at 65 miles per hour on a 86.0 °F summer day, Bari heard a siren approaching. Bari knows that a police siren's frequency is 1280.0 Hz, but it didn't sound like that. Bari pulled over a lane, without slowing down, after seeing the flashing lights of the police car coming up from behind, and the police passed going 25 miles per hour faster than Bari was going. (1 mile = 1.60 km) a) what was the speed of sound on that warm summer day? b) How fast, in m/s, was the police car going? c) What frequency did Bari hear from the siren before the police car passed? d) What frequency did Bari hear from the siren after the police care had passed?30 m from an ultrasonic sensor. The total travel time of the ultrasonic wave is 33 ms (milliseconds). What is the speed of sound in these conditions?An ultrasonic scan uses the echo waves coming from something moving (such as the beating heart of a fetus) inside the body and the waves that are directly received from the transmitter to form a measurable beat frequency. This allows the speed of the internal structure to be isolated and analyzed. The speed of the ultrasound waves in tissue is about 1540 m/s. What is the beat frequency ?beats detected when waves with a frequency of 3.80 MHz are used to scan a fetal heartbeat (moving at a speed of ±8.50 cm/s)? hint that came with it: In this problem there's a stationary source of ultrasound that reflects sound off of a moving object which then returns back to the ultrasound device to measure the frequency. There are 2 Doppler shifts that need to be considered. First the stationary source and the moving observer. Second, when the sound reflects off, the moving object now becomes the source and the ultrasound device becomes the observer. In this shift, the frequency measured by the…
- A student shares a surgical tubing in the lab. The tension on the tubing is 50N. The student measures the fourth frequency of the tubing to the 20 Hz. The length of the tubing is 2m. Calculate the mass of the tubingIt's Christmas time and you blast your Christmas music with the windows down in your car. Your grinchy roommate hears your music 30 meters away. The final note in the song is a B, playing at 493 Hz, but your roommate smiles because to him it sounds like a B-flat, playing at 440 Hz. How fast are you driving relative to your roommate? And in what direction?A bat at rest sends out ultrasonic sound waves at 54.0 kHz and receives them returned from an object moving directly away from it at 33.0 m/s . What is the received sound frequency?