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WorksheetsStanding waves - Basics
Total questions: 20
Worksheet time: 43mins
Standing waves are created by
Two identical waves reflecting off each other
Two identical waves being diffracted together
Two identical waves move through each other in opposite directions
Two identical waves are diffracted from two identical sources
Do standing waves carry energy from one area to another?
Yes
No
In the diagram which letters represent the nodes
A B C
A C 3
B D
B D E
A C D
Which statement is correct about the half wave A B C
All particles in this half wave are in phase with each other as they all move in the same direction
The particles A B C are in phase with the next half wave C D E because they all move in the same direction
All particles in this part of the wave are out of phase with each other as they all move in different directions
All particles in A B C have carried energy from one area to another
Standing waves created in strings, pipes and closed pipes have specific wavelengths that fit into the length of those instruments
True
False
Even numbered harmonics do not form in a closed pipe because
the pipe “fits” only an odd number of quarter wavelengths
the pipe “fits” only an even number of quarter wavelengths
the pipe cannot put an anti-node at the open end
the pipe cannot get enough air to vibrate in the pipe at these lengths
What number harmonic is shown in C
1
2
3
4
What number harmonic is shown in A
1
2
3
4
What number harmonic is shown in D
1
2
3
4
What number harmonic is shown in B
1
2
3
4
What is the fist harmonic also called?
First harmonic
First Overtone
The fundamental
The resonant frequency
If a sound wavelength gets smaller what do you hear?
A louder sound
A quieter sound
A higher pitch sound
A lower pitch sound
If a sound Amplitude gets smaller what do you hear?
A louder sound
A quieter sound
A higher pitch sound
A lower pitch sound
A wave with a wavelength of 5m is traveling with a velocity of 2.5 m/s. Calculate its frequency.
12.5 Hz
0.5 Hz
2 Hz
15 Hz
In the diagram which letters represent where a sound wave will be at its loudest?
A B C
A C 3
B D
B D E
A C D
If you walk along the line of the standing wave what will you hear?
The sound loudness stays the same from A to E
The pitch of the sound changes as you move from A to B to C
The loudness of the wave changes from no sound / quietest at B to loudest at C
The loudness of the wave changes from no sound / quietest at C to loudest at D
The pipe length of C is 0.25 m. What is the wavelength of the sound produced?
0.25 m
0.5 m
0.75 m
1 m
The pipe length of B is 0.25 m. What is the wavelength of the sound produced?
0.25 m
0.5 m
0.75 m
1 m
The pipe length of A is 0.18 m. Sound travels at 343 ms-1 Calculate the frequency of the sound produced.
686 Hz
1905.56 Hz
343 Hz
1429.17 Hz
The pipe length of D is 0.65 m. The frequency of the sound produced is 1200 Hz. Calculate the wave velocity.
120 m/s
600 m/s
343 m/s
780 m/s
