7. When you hear a sonic boom, you often cannot see the plane that made it. Why is that?

Q: Does a sonic boom occur at the moment when the aircraft exceeds the speed of sound? Explain.

A: When an aircraft moves faster than the speed of the sound, then the plane produced a…

Q: 8. The distance between the 3rd and 7h node of a standing wave is 75cm. Find the speed of the waves…

A:

Q: We can be heard in an adjoining room even when we are talking in another room with doors tightly…

A: Sound is referred as vibrations of particles in a transmission medium which propagates as an…

Q: What minimum distance is required between the source of sound and the reflecting surface to hear an…

A: We know speed of light in air is nearly 330 m/s.  Now To differentiate two different sound event our…

Q: 10. When a sound wave hits a solid surface, some of the energy is and some of it is reflected.

A: A wave is a propagating disturbance which have energy without any net moment of its particles from…

Q: 12.Why the siren on an ambulance has a high pitch when it is approaching you and a low pitch when it…

A:

Q: 6) If the full wavelength of a 440 Hz sound in a liquid is 3.3 m, what is the speed of sound in that…

A:

Q: What are conditions for sound to interfere?

A:

Q: 13. The warning tag on a lawn mower states that it produces noise at a level of 91.0 dB. What is…

A: Given data

Q: 10) Two consecutive frequencies of standing waves on a string fixed at both ends are 280 Hz and 315…

A: The formula for the frequency of nth harmonic can be determined as below, Here v is the velocity of…

Q: A Doppler effect occurs when a source of sound does what?

A: Given:  Source of sound

Q: 9. Determine the number of decibels from a normal conversation with sound intensity of 10 wattslm.

A: Answer: Given data,  Intensity of sound (I)=10-8 watts/m2

Q: An explosion occurs just below the surface of the water, will you hear it first if you are on the…

A: According to the problem, the explosion happens under the water; therefore, we consider two cases to…

Q: 10. Determine the number of decibels from a Jack Hammer with sound intensity of 3.2 x 10a wattsim?

A:

Q: What is relationship between frequency and pitch?

A: The pitch increases with increase in frequency and decreases with decrease in the frequency.

Q: 8) What is the frequency and wavel ength of the wave shown in the figure given the speed of the wave…

A:

Q: 103. •Biology The area of a typical eardrum is 5.0 x 10-5 m². Find the sound power incident on an…

A:

Q: 49.The energy of the wave that passes through unit area per unit time is called as

A:

Q: 7) If sound with a frequency of 442 Hz travels through a metal with a lowest (%) wavelength of 5.83…

A: Wavelength of sound  Frequency of sound

Q: 69. The bellow of a territorial bull hippopotamus has been measured at115 dB above the threshold of…

A: Given : β=115 db As we know , the sound intensity is given as :

Q: 55. What is the ratio of the intensity of a given sound to that of one that is 100 decibels higher?

A: Write the formula for the sound intensity level in dB.

Q: 6. A train approaching a crossing sounds its horn with a frequency of 750 Hz. An observer standing…

A: Given: The frequency of the train's (the source's) horn: fs = 750 Hz. The frequency of the whistle…

Q: Violins are short instruments, while cellos and basses are long. In terms of the frequency of the…

A: The frequency produced by an instrument is calculated by the mathematical formula, f=12LTμ Here, L…

Q: When dolphin swims close to its prey, it transmits sound waves to figure out details (like direction…

A: The Doppler’s formula for observed frequency fo, in case of source moving away from observer while…

Q: 2. As it approaches a boy standing on the road, an ambulance traveling at 100 km/hr blows its siren.…

A: Given velocity of the ambulance approaching the boy is vs = 100 km/hr = 27.78 m/s and the frequency…

Q: The whistle of an approaching engine appears to be shriller than that of a receding engine.Explain.

A: Given:  whistle of an engine

Q: 52. The noise level of a whisper is about 30 decibels, and that of ordinary conversation is around…

A:

Q: True or false: In order for an object to produce a sonic boom, it must be “noisy.” Give two examples…

A: The given statement is false.

Q: The volume of a sound wave corresponds to what for a general wave?

A:

Q: What is the wavelength of a 340-Hz tone in air? What is the wavelength of a 34,000-Hz ultrasonic…

A:

Q: 8. A physics student notices that 4.0 waves ar- rive at the beach every 20. seconds. The fre- quency…

A:

Q: 12. Two waves travel at the same speed. The frequency of wave A is 1000 Hz, and the frequency of…

A:

Q: 65. Two waves traveling in the same medium and having the same wavelength (X) interfere to create a…

A:

Q: As the pitch of the sound increases, what happens to the frequency?

A: As the pitch of the sound increases, its frequency will increase as well.

Q: -96 A listener detects a sound with an intensity of 2. 00 x 10° w/m.If the sound is generated at…

A: Given: The intensity is I=2X10-6 W/m2. The power is P=80 W. The expression for power is:…

Q: 7. If wavelength of third harmonic of standing waves in a sting is 5m, what is the length of the…

A: We will answer the first question since the exact one was not specified. Please submit a new…

Q: A man standing between two Clift clap his hand and hear two echoes after 3.65 and 4.2 respectively.…

A: The man is in between the two cliffs as shown is figure here, The man listens two echoes after 3.65…

Q: A sound pulse emitted underwater reflects off a school of fish and is detected at the same place…

A: At 20 degree, the sound velocity in air is 1481m/s. The expression for the distance is,

Q: Is the speed of sound independent of frequency? Explain.

A: Yes speed of sound is independent of frequency. It depends on medium in which it travel.

Q: 21. A sound wave travels at 340 meters per second. Determine how far from the source the wave has…

A:

Q: 76. A bird is fl ying directly toward a stationary bird-watcher and emits afrequency of 1250 Hz. The…

A: Observed frequency of sound is,  f0=v+v0v+vsfs Here,  v=velocity of sound  v0=velocity of observer…

Q: 5. A water wave is observed to move 13.5m in 4.0s. If the distance between successive crests is…

A:

Q: 12. If a vacuum cleaner sound measured 70 dB, determine the sound intensity in wattsim?.

A: The amount of energy that strikes 1-meter square area in one second is called the intensity of that…

Q: 8. Which points on the wave below are in phase and which are out of phase? AA E A D

A: