Exam 14: Sound

A note is being played on a string on a guitar.The string is then pushed to the side while still in contact with the same fret.What happens to the frequency of the note then played compared to the original note?

(Multiple Choice)

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Question 21

The frequency separating audible waves and ultrasonic waves is considered to be 15.0 kHz.What wavelength in air at room temperature is associated with this frequency? (Assume the speed of sound to be 225 m/s. )

(Multiple Choice)

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Question 22

Tripling the distance between sound source and a listener will change the intensity,as detected by the listener,by what factor?

(Multiple Choice)

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Question 23

A standing wave is set up in a 200-cm string fixed at both ends.The string vibrates in 8 distinct segments when driven by a 120-Hz source.What is the wavelength?

(Multiple Choice)

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Question 24

Which of the following best describes a sound level of intensity 1 W/m²?

(Multiple Choice)

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Question 25

A pipe is open at both ends.The distance from a node to its adjacent antinode is equal to _______.

(Multiple Choice)

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Question 26

As a train starts from rest and then accelerates down the track,coming toward me faster and faster,the speed of the sound waves coming toward me will be

(Multiple Choice)

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Question 27

Standing waves can result from _____ waves.

(Multiple Choice)

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Question 28

A sound intensity of 70 dB is observed at a distance d from the source of sound.What sound intensity would be observed at a distance 2d from the source?

(Multiple Choice)

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Question 29

An ambulance with its siren on is heading due east along a straight road at 60 mph.A car is also moving along the same road.In which case will the driver of the car perceive the frequency of the siren to be lowest?

(Multiple Choice)

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Question 30

In which part of the ear is the cochlea?

(Multiple Choice)

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Question 31

The speed of sound in air is a function of which one of the following?

(Multiple Choice)

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Question 32

The number of overtones,and their relative intensities,is associated with what property of the tone generated by a musical instrument?

(Multiple Choice)

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Question 33

When two sound waves are out of phase by ____,destructive interference will occur.

(Multiple Choice)

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Question 34

A buzzer with frequency f₀ is thrown straight upwards.On the buzzer's trip down,what is the frequency behavior heard by an observer below?

(Multiple Choice)

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Question 35

How many nodes does a standing wave in a string have at the frequency of the sixth harmonic?

(Multiple Choice)

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Question 36

A vibrating guitar string emits a tone simultaneously with one from a 495-Hz tuning fork.If a beat frequency of 5.00 Hz results,what is the frequency of vibration of the string?

(Multiple Choice)

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Question 37

A chamber that can be filled with different gases has placed in it a source of sound that in air produces a frequency of 200 Hz and a microphone to pick up the sound for frequency analysis.First the chamber is filled with helium (speed of sound 1 000 m/s at room conditions),then the helium is replaced with oxygen (speed of sound 330 m/s at room conditions),and then finally the helium is replaced with carbon dioxide (speed of sound 269 m/s at room conditions).In which gas is the highest frequency of sound found by the microphone during this experiment?

(Multiple Choice)

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Question 38

A very loud train whistle has an acoustic power output of 100 W.If the sound energy spreads out spherically,what is the intensity level in dB at a distance of 89.0 meters from the train? (I₀ = 10−¹² W/m²)

(Multiple Choice)

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Question 39

Quintupling the tension in a guitar string will change its natural frequency by what factor?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 96

A note is being played on a string on a guitar.The string is then pushed to the side while still in contact with the same fret.What happens to the frequency of the note then played compared to the original note?

The frequency separating audible waves and ultrasonic waves is considered to be 15.0 kHz.What wavelength in air at room temperature is associated with this frequency? (Assume the speed of sound to be 225 m/s. )

Tripling the distance between sound source and a listener will change the intensity,as detected by the listener,by what factor?

A standing wave is set up in a 200-cm string fixed at both ends.The string vibrates in 8 distinct segments when driven by a 120-Hz source.What is the wavelength?

Which of the following best describes a sound level of intensity 1 W/m2?

A pipe is open at both ends.The distance from a node to its adjacent antinode is equal to _______.​

As a train starts from rest and then accelerates down the track,coming toward me faster and faster,the speed of the sound waves coming toward me will be

Standing waves can result from _____ waves.

A sound intensity of 70 dB is observed at a distance d from the source of sound.What sound intensity would be observed at a distance 2d from the source?

​An ambulance with its siren on is heading due east along a straight road at 60 mph.A car is also moving along the same road.In which case will the driver of the car perceive the frequency of the siren to be lowest?

In which part of the ear is the cochlea?

The speed of sound in air is a function of which one of the following?

The number of overtones,and their relative intensities,is associated with what property of the tone generated by a musical instrument?

When two sound waves are out of phase by ____,destructive interference will occur.

A buzzer with frequency f0 is thrown straight upwards.On the buzzer's trip down,what is the frequency behavior heard by an observer below?

How many nodes does a standing wave in a string have at the frequency of the sixth harmonic?

A vibrating guitar string emits a tone simultaneously with one from a 495-Hz tuning fork.If a beat frequency of 5.00 Hz results,what is the frequency of vibration of the string?

A very loud train whistle has an acoustic power output of 100 W.If the sound energy spreads out spherically,what is the intensity level in dB at a distance of 89.0 meters from the train? (I0 = 10−12 W/m2)

Quintupling the tension in a guitar string will change its natural frequency by what factor?

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Which of the following best describes a sound level of intensity 1 W/m²?

A pipe is open at both ends.The distance from a node to its adjacent antinode is equal to _______.

An ambulance with its siren on is heading due east along a straight road at 60 mph.A car is also moving along the same road.In which case will the driver of the car perceive the frequency of the siren to be lowest?

A buzzer with frequency f₀ is thrown straight upwards.On the buzzer's trip down,what is the frequency behavior heard by an observer below?

A very loud train whistle has an acoustic power output of 100 W.If the sound energy spreads out spherically,what is the intensity level in dB at a distance of 89.0 meters from the train? (I₀ = 10−¹² W/m²)