Is there an appreciable Doppler effect when the motion of the source is at right angles to a listener? Explain.

Q: A single sound has an intensity level of 72 dB. If four identical sounds are produced…

A: Given data, Intensity of a single sound = 72 dB

Q: Which has a more direct influence on the loudness of a sound wave: the displacement amplitude or the…

A: The relation between loudness and intensity is, Loudness=10logIIo where I is the intensity of the…

Q: Tripling the distance between sound source and a listener will change the intensity, as detected by…

A:

Q: For the given boundary, what is the angle between the incident and reflected wave ?

A: On reflection from free end , phase of wave remains same it does not change .On reflection from…

Q: How is it possible to detect the filling of a bottle under a water tap by hearing the sound at a…

A: The pitch of a sound is inversely proportional to the length of vibrating air column.

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: The main factor which effects the speed of a sound wave is the ?

A: Correct option is:properties of the medium

Q: Is there an appreciable Doppler effect when the motion of the source is at right angles to a…

A: Doppler Effect is defined as the increase or decrease in the frequency of the wave with respect to…

Q: Provide the wavelengths for the first three resonant frequencies produced by a vibrating string…

A: A string, held by its ends, when vibrated produces a standing wave pattern. This standing wave…

Q: If the sound of an airplane does not come from the part of the sky where the plane is seen, does…

A: If the sound of an airplane does not come from the part of the sky where the plane is seen, then it…

Q: ssume that the speed of sound is 343 m/s at 20 degrees C. Also assume that a bat uses an ultrasonic…

A:

Q: An outside loudspeaker emits sound waves with a power output of 100 W. Calculate the intensity level…

A:

Q: Below is a diagram of the Doppler effect in water, observed in a ripple tank. As depicted, the…

A: Doppler shift: If an underwater object is moving relative to an underwater receiver, the frequency…

Q: The intensity level of fruit fly is about 39 dB. About how many fruit flies will produce an…

A: The intensity of a fruit fly is I = 39 dB. let n be the no of fruit flies that is required to…

Q: When you blow your horn while driving toward a stationary listener, the listener hears an increase…

A: According to Doppler’s effect: If the distance between the observer and source is decreasing, then…

Q: 4. If you see a firecracker combust 900.0 m away and the temperature of the dry air is 30 *C, how…

A: distance of fire d = 900m temperature T = 30 C = 303.15 k The relation between the speed of sound in…

Q: A speaker is recorded at 65 dB at a distance 5.0 m. If two of the speakers are played…

A: Sound in perceived form and as calculated numbers in dB very differently. If the sound perceived is…

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: The intensity level of an orchestra is 85 dB. A single violin achieves a level of 70 dB. How does…

A: We know that the general formula for the sound intensity level in decibels corresponding to…

Q: give an example of a transverse and longitudinal wave

A: Required : Example of transverse and longitudinal waves.

Q: A thunder was heard 2 sec later after the lightning is seen. If the distance of lightning is 698 m…

A: Given data: Time (t) = 2 s Distance traveled by sound wave (d) = 698 m Required: The speed of sound

Q: What frequency is received by a stationary mouse just before being dispatched by a hawk flying at it…

A:

Q: Two nearby trumpets are sounded together and a beat frequency of 2 Hz is heard. If one of the…

A: Beat frequency is defined as the absolute difference between the frequencies produced by the…

Q: You shouted towards a cliff 320 m away from you. The ambient temperature at that time is 29°C. How…

A: Speed of sound at 29 oC is v=348.4 m/s The time taken to hear the reflected sound is    t=2dv…

Q: At a distance of 13m from the point source the intensity is 80 dBm. At what distance from the source…

A: Intensity α1distance2 (given) I1 =80 dBr1=13 mI2 =40 dB Intensity due to point source varies with…

Q: siess otherwise stated take the speed of sound in air to be 340 m.s". You hear a thunderciap 5 s…

A:

Q: The speed of sound in air at NTP is 331m/s. Calculate the speed when the temperature rises to 91…

A:

Q: A wave of wavelength 00 cm is produced in air and it travels at a speed of 300 ms. Will it be…

A: Given: The wavelength of the wave is 0.6 cm. The speed of the wave is 300 m/s.

Q: The coldest and hotest temperatures ever recorded in the United States are -80 degrees F (211K) and…

A:

Q: Loud speech, measured at 3 meters away, has a sound intensity level LI of 73dB. Find the…

A: Sound loudness level (β) = 73 dB distance (d) = 3 m

Q: When a sound source is receding from an observer, the wavelength of the sound wave will and the…

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Q: Can you tell that your roommate turned up the sound on the TV if its average sound intensity level…

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Q: I need to understand how I get the experimental determined speed of sound if my calculated…

A: We have the measured length. We will use it to calculate the wavelength by given formula in table.…

Q: Standing waves can be said to be due to “interference inspace,” whereas beats can be said to be due…

A: Given: Standing waves can be said to be due to “interference in space,” whereas beats can be said to…

Q: The driver of a car traveling 22.0 m/s sounds his horn as he approaches an intersection. If the horn…

A:

Q: Steve, stop his motorbike is gunning towards a hillAt 20 m/s with his loudspeaker on resonating at…

A:

Q: in my town a siren is sounded at the fire station at call volunteer firmen to duty .if the frequency…

A:

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: 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: Can the average person tell that a 2002-Hz sound has a different frequency than a 1999-Hz sound…

A: The frequency,

Q: The record for the world’s loudest burp is 109.9 dB, measured at a distance of 2.5 m from the…

A: Given data: Sound intensity level, β=109.9 dB Distance, r=2.5 m Known data: Threshold intensity of…

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: A baseball hits a car, breaking its window and triggering its alarm which sounds at a frequency of…

A: Formula for frequency heard by the boy,

Q: In what part of the frequency spectra would expect to find the minimum noise from the atmosphere and…

A: The solar spectra has a 1/f noise pattern.

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.