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SOUND IN PIPES

Total questions: 104

Worksheet time: 2hrs 44mins

Name
Class
Date
1.

Sound is a form of _________.

a)

light

b)

energy

c)

matter

2.

Sound is a result of vibrating ________.

a)

matter

b)

light

3.

Which of the following is NOT another name for a sound wave?

a)

Longitudinal Wave

b)

Compression Wave

c)

Transverse Wave

4.

Which term do we use to describe when molecules are spread out?

a)

Compression

b)

Rarefaction

c)

Crest

d)

Trough

5.

Amplitude refers to the ________ of a sound wave.

a)

length

b)

width

c)

height

6.

The part of a sound wave where the molecules are pressed together is called _______________.

a)

Rarefaction

b)

Compression

c)

Wavelength

d)

Amplitude

7.

A slinky is a good example of which type of wave?

a)

Transverse

b)

X-Ray

c)

Compression

d)

Radio

8.

Sound travels slowest through _________.

a)

solid

b)

liquid

c)

gas

9.

Sound travels fastest through __________.

a)

solid

b)

liquid

c)

gas

10.

Which best describes wavelength?

a)

The highest point on a wave.

b)

The lowest point on a wave.

c)

The distance from one point on a wave to the same point on the next wave.

d)

The total number of waves in one complete cycle.

11.

This sound wave demonstrates ________ pitch.

a)

high

b)

low

12.

The number of sound waves produced over a certain time is called ________________.

a)

pitch

b)

ranges

c)

compression

d)

frequency

13.

True or False:


High frequency = High pitch.

a)

True

b)

False

14.

Why does sound not travel through space?

a)

Space is too large!

b)

Sound waves only travel through water.

c)

Sound waves only travel where there is matter through which the vibrations can move.

15.

In a sound with a high pitch...

a)

Wavelengths are short.

b)

Wavelengths are long.

c)

Wavelengths are the same length as low pitch sounds.

16.

True or False:


Sound travels faster than light.

a)

True

b)

False

17.

How does this instrument make sound?

a)

The strings vibrate.

b)

The drum is struck.

c)

The drum is shaken.

18.

Which of the following pipes on the instrument above most likely has the highest pitch when air is blown through it?

a)

A

b)

B

c)

C

d)

D

19.

How does this instrument make sound?

a)

The musician blows into a mouthpiece.

b)

The wind causes the strings to vibrate.

c)

As the bow goes across the strings, it causes vibrations in the violin.

20.

True or False:


Some animals produce sounds that humans cannot hear.

a)

True

b)

False

21.

Standing waves are created by

a)

Two identical waves reflecting off each other

b)

Two identical waves being diffracted together

c)

Two identical waves move through each other in opposite directions

d)

Two identical waves are diffracted from two identical sources

22.
The moving black dot is called:
a)
a node
b)
an anti-node
c)
an anti-amplitude
d)
the wangy bit
23.
The stationary dot is called:
a)
a node.
b)
an anti-node.
c)
the amplitude.
d)
the not moving bit.
24.

In the diagram which letters represent the nodes

a)

A B C

b)

A C E

c)

B D

d)

B D E

e)

A C D

25.
The diagram shows the standing wave pattern of a vibrating string which is fixed at ends X and Y.
Which one of these statements is true?
a)
P to R is one wavelength.
b)
At R the string will move up.
c)
The lowest frequency for this string is one third of its current value.
d)
The kinetic energy of the string is at its maximum value.
26.
A receiver R is moved from S (a reflector) towards T (a transmitter). The intensity changes as in the diagram. Which of the following statements is correct?
a)
R is measuring the amplitude.
b)
The frequency of the microwaves is 2.5 GHz.
c)
The wavelength of the microwaves is 6.0 cm.
d)
The amplitudes of the transmitted and reflected waves are always equal.
27.
A standing wave:
a)
transports energy but does not move.
b)
is composed of a single travelling wave.
c)
stores energy.
d)
makes a loud noise.
28.
What are the boundary conditions for these standing waves?
a)
Anti-nodes at each end.
b)
The surface of the string is smooth.
c)
The string is free at both ends.
d)
There is a node at each end.
29.

Standing wave patterns produced in a medium are constrained to integer or half-integer multiples of resonant wavelengths. If a rope is fixed at both ends 1 m apart, which wavelength below could not possibly produce a standing wave?

a)

2 m

b)

1/3 m

c)

1/4 m

d)

3 m

30.

Standing waves created in strings, pipes and closed pipes have specific wavelengths that fit into the length of those instruments

a)

True

b)

False

31.

A pipe, opened at both ends (40 cm long) makes a tone travelling at 330 m/s. Calculate the frequency of the fundamental wave.

a)

4.125 Hz

b)

264 Hz

c)

26400 Hz

d)

412.5 Hz

32.

Even numbered harmonics (multiples of fundamental frequency) do not form in a closed pipe because

a)

the pipe “fits” only an odd number of quarter wavelengths

b)

the pipe “fits” only an even number of quarter wavelengths

c)

the pipe cannot put an anti-node at the open end

d)

the pipe cannot get enough air to vibrate in the pipe at these lengths

33.

The pipe length of A is 0.18 m. Sound travels at 343 ms-1 Calculate the frequency of the sound produced.

a)

686 Hz

b)

1905.56 Hz

c)

343 Hz

d)

1429.17 Hz

34.

The pipe length of B is 0.25 m. What is the wavelength of the sound produced?

a)

0.25 m

b)

0.5 m

c)

0.75 m

d)

1 m

35.

The pipe length of C is 0.25 m. What is the wavelength of the sound produced?

a)

0.25 m

b)

0.5 m

c)

0.75 m

d)

1 m

36.

The pipe length of D is 0.65 m. The frequency of the sound produced is 1200 Hz. Calculate the wave velocity.

a)

120 m/s

b)

600 m/s

c)

343 m/s

d)

780 m/s

37.

Sound is a type of energy that is transmitted in the form of --

a)

circuits

b)

waves

c)

heat

d)

elections

38.

The greater the frequency of a sound wave, the --

a)

higher the pitch

b)

lower the pitch

c)

louder the sound

d)

quieter the sound

39.

Which word means "the loudness of the sound"?

a)

Pitch

b)

Frequency

c)

Volume

40.

Which word means "the speed of the sound's vibrations"?

a)

Pitch

b)

Frequency

c)

Volume

41.

Which word means "the highness or lowness of the sound"?

a)

Pitch

b)

Frequency

c)

Volume

42.

Which of these transmits sound the fastest?

a)

A metal rod

b)

Water in a pool

c)

Air in a balloon

d)

Empty Space

43.

How is the use of sound waves helpful to this whale?

a)

It makes it easier to obtain oxygen.

b)

It makes the water warmer.

c)

It signals fish to move out of the whale's path.

d)

It helps the whale locate food.

44.

Label the part of the sound wave.

a)

Amplitude

b)

Wavelength

c)

Sound

d)

Valley

45.

Label the part of the sound wave.

a)

Amplitude

b)

Wavelength

c)

Sound

d)

Valley

46.

How do musical instruments produce sound?

a)

Through air molecules

b)

By hiding wavelengths

c)

By pitching sounds

d)

Through vibrations

47.

Which statements correctly describe the sounds the birds are making? Choose all the correct answers.

a)

Both birds' sounds have the same pitch because they have the same frequency and wavelength.

b)

Bird A's sound has a higher pitch than Bird B's sound.

c)

Bird B's sound is louder because it has a higher amplitude.

d)

Bird A's sound is louder because it has a lower amplitude.

48.

The volume of a sound is measured in --

a)

hertz

b)

decibels

c)

molecules

d)

wavelengths

49.

Which correctly shows the order for how fast sound travels through matter (fastest is first).

a)

Gas, Liquid, Solid

b)

Solid, Gas, Liquid

c)

Liquid, Solid, Gas

d)

Solid, Liquid, Gas

50.

Which term describes when sound molecules are pressed together in some parts?

a)

Compression

b)

Rarefaction

51.

Which term describes when sound molecules are spread out?

a)

Compression

b)

Rarefaction

52.

Which item creates the quietest sounds?

a)

Whisper

b)

Quiet radio

c)

Leaves rustling

d)

Conversation

53.

Which animal makes a high-pitched sound?

a)

Lion

b)

Cow

c)

Bird

54.

Where would a banjo best fit on the chart?

a)

3

b)

1

c)

4

d)

2

55.

What would best replace the number 2 on the chart?

a)

Vibrating Strings

b)

Pushing Air

c)

Making Impact

d)

Mouth Position

56.

Which of the following pipes on the instrument most likely has the highest pitch when air is blown through it?

a)

Pipe D

b)

Pipe A

c)

Pipe C

d)

Pipe B

57.

Standing waves are created by

a)

Two identical waves reflecting off each other

b)

Two identical waves being diffracted together

c)

Two identical waves move through each other in opposite directions

d)

Two identical waves are diffracted from two identical sources

58.

Do standing waves carry energy from one area to another?

a)

Yes

b)

No

59.

In the diagram which letters represent the nodes

a)

A B C

b)

A C 3

c)

B D

d)

B D E

e)

A C D

60.

Which statement is correct about the half wave A B C

a)

All particles in this half wave are in phase with each other as they all move in the same direction

b)

The particles A B C are in phase with the next half wave C D E because they all move in the same direction

c)

All particles in this part of the wave are out of phase with each other as they all move in different directions

d)

All particles in A B C have carried energy from one area to another

61.

Standing waves created in strings, pipes and closed pipes have specific wavelengths that fit into the length of those instruments

a)

True

b)

False

62.

Even numbered harmonics do not form in a closed pipe because

a)

the pipe “fits” only an odd number of quarter wavelengths

b)

the pipe “fits” only an even number of quarter wavelengths

c)

the pipe cannot put an anti-node at the open end

d)

the pipe cannot get enough air to vibrate in the pipe at these lengths

63.

What number harmonic is shown in C

a)

1

b)

2

c)

3

d)

4

64.

What number harmonic is shown in A

a)

1

b)

2

c)

3

d)

4

65.

What number harmonic is shown in D

a)

1

b)

2

c)

3

d)

4

66.

What number harmonic is shown in B

a)

1

b)

2

c)

3

d)

4

67.

What is the fist harmonic also called?

a)

First harmonic

b)

First Overtone

c)

The fundamental

d)

The resonant frequency

68.

If a sound wavelength gets smaller what do you hear?

a)

A louder sound

b)

A quieter sound

c)

A higher pitch sound

d)

A lower pitch sound

69.

If a sound Amplitude gets smaller what do you hear?

a)

A louder sound

b)

A quieter sound

c)

A higher pitch sound

d)

A lower pitch sound

70.

A wave with a wavelength of 5m is traveling with a velocity of 2.5 m/s. Calculate its frequency.

a)

12.5 Hz

b)

0.5 Hz

c)

2 Hz

d)

15 Hz

71.

In the diagram which letters represent where a sound wave will be at its loudest?

a)

A B C

b)

A C 3

c)

B D

d)

B D E

e)

A C D

72.

If you walk along the line of the standing wave what will you hear?

a)

The sound loudness stays the same from A to E

b)

The pitch of the sound changes as you move from A to B to C

c)

The loudness of the wave changes from no sound / quietest at B to loudest at C

d)

The loudness of the wave changes from no sound / quietest at C to loudest at D

73.

The pipe length of C is 0.25 m. What is the wavelength of the sound produced?

a)

0.25 m

b)

0.5 m

c)

0.75 m

d)

1 m

74.

The pipe length of B is 0.25 m. What is the wavelength of the sound produced?

a)

0.25 m

b)

0.5 m

c)

0.75 m

d)

1 m

75.

The pipe length of A is 0.18 m. Sound travels at 343 ms-1 Calculate the frequency of the sound produced.

a)

686 Hz

b)

1905.56 Hz

c)

343 Hz

d)

1429.17 Hz

76.

The pipe length of D is 0.65 m. The frequency of the sound produced is 1200 Hz. Calculate the wave velocity.

a)

120 m/s

b)

600 m/s

c)

343 m/s

d)

780 m/s

77.

Intensity in sound is called:

a)

Loudness

b)

Brightness

c)

Power

d)

Energy

78.

Electromagnetic Spectrum is

a)

All different kind of frequencies for EM waves.

b)

All different kind of frequencies for all waves.

c)

All different kind of frequencies for sound waves.

79.

The UV rays have ...

a)

higher frequency than Infrared

b)

higher frequency than Gamma rays

c)

higher wavelength than Infrared

d)

lower wavelength than Gamma rays

80.

The X-rays have ...

a)

lower frequency than UV rays

b)

lower frequency than Gamma rays

c)

higher wavelength than Infrared

d)

lower wavelength than Gamma rays

81.

The wavelength of the Infrared is ...

a)

greater than red color

b)

smaller than blue light

c)

greater than microwaves

d)

smaller than UV rays

82.

The frequency of the blue color is ...

a)

greater than red color's ƒ

b)

greater than UV's ƒ

c)

Greater than gamma's ƒ

83.

The frequency of the blue color is ...

a)

c / 650nm

b)

c / 650x10-6 m

c)

c / 450nm

d)

c / 450x10-6m

84.

Destructive interference in a spot caused by two waves is

a)

When crest and trough meet

b)

when path difference is (n+12λ)\left(n+\frac{1}{2}\lambda\right)  

c)

when crest and crest meet

d)

when path difference is (nλ)\left(n\lambda\right)  

85.

Is the maximum displacement in a standing wave

a)

antinode

b)

node

c)

first harmonics

d)

in phase

86.

the wavelength for the fundamental harmonic in standing waves on strings and open-open pipes is

a)

λ1=2L\lambda_1=2L  

b)

λ1=23L\lambda_1=\frac{2}{3}L  

c)

λ1=L\lambda_1=L  

d)

λ1=4L\lambda_1=4L  

87.

the wavelength for the fundamental harmonic in standing waves on open-close pipes is

a)

λ1=2L\lambda_1=2L  

b)

λ1=23L\lambda_1=\frac{2}{3}L  

c)

λ1=L\lambda_1=L  

d)

λ1=4L\lambda_1=4L  

88.

In refraction the frequency ...

a)

does not change (see same color)

b)

changes because of the change in medium.

c)

changes because is bent

d)

does not change because is just bent.

89.

Intensity in light is called:

a)

Loudness

b)

Brightness

c)

Power

d)

Energy

90.
The moving black dot is called:
a)
a node
b)
an anti-node
c)
an anti-amplitude
d)
the wangy bit
91.
The stationary dot is called:
a)
a node.
b)
an anti-node.
c)
the amplitude.
d)
the not moving bit.
92.

In the diagram which letters represent the nodes

a)

A B C

b)

A C E

c)

B D

d)

B D E

e)

A C D

93.
A standing wave:
a)
transports energy but does not move.
b)
is composed of a single travelling wave.
c)
stores energy.
d)
makes a loud noise.
94.
What are the boundary conditions for these standing waves?
a)
Anti-nodes at each end.
b)
The surface of the string is smooth.
c)
The string is free at both ends.
d)
There is a node at each end.
95.

Standing waves created in strings, pipes and closed pipes have specific wavelengths that fit into the length of those instruments

a)

True

b)

False

96.

A pipe, opened at both ends (40 cm long) makes a tone travelling at 330 m/s. Calculate the frequency of the fundamental wave.

a)

4.125 Hz

b)

264 Hz

c)

26400 Hz

d)

412.5 Hz

97.

The figure represents a string of length L, fixed at both ends, vibrating in several harmonics. Which string shows the 4th harmonic?

a)

A

b)

B

c)

C

d)

D

e)

E

98.

The figure represents a string of length L, fixed at both ends, vibrating in several harmonics. Which string shows the 3rd harmonic?

a)

A

b)

B

c)

C

d)

D

e)

E

99.

The figure shows several modes of vibration of a string fixed at both ends. The mode of vibration that represents the fifth harmonic is

a)

1

b)

2

c)

3

d)

4

e)

None of these is correct.

100.

The air in a closed organ pipe vibrates as shown. The length of the pipe is 3.0 m. The frequency of vibration is 80 Hz. The speed of sound in the pipe is approximately

a)

80 m/s

b)

0.16 km/s

c)

0.24 km/s

d)

0.32 km/s

e)

0.96 km/s

101.

A pipe that is open at both ends has a fundamental frequency of 150 Hz when the speed of sound in air is 300 m/s. How long is the pipe?

a)

2.0𝑚

b)

1.0𝑚

c)

1.5𝑚

102.
Which harmonic is shown?
a)
2nd
b)
3rd
c)
4th
d)
5th
103.

What can you say about two points between 2 nodes?

a)

All particles between nodes are in phase.

b)

All particles between nodes are out of phase.

c)

All particles between nodes are π\pi  out phase.

d)

All particles between nodes are π2\frac{\pi}{2}   phase.

104.

The picture shows a wave at t = 0

What can we say about the displacement of the particles at t = 34f t\ =\ \frac{3}{4f}\  

a)

it will be the at same displacement (same image as above)

b)

it will be a shift π\pi  displacement (opposite to the image as above)

c)

they will have 0 displacement

(horizontal flat line)

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