Worksheetsstanding waves
Total questions: 15
Worksheet time: 26mins
the wiggly bit
In the diagram which letters represent the nodes
A B C
A C E
B D
B D E
A C D
Standing waves created in strings, pipes and closed pipes have specific wavelengths that fit into the length of those instruments
True
False
A pipe, opened at both ends (40 cm long) makes a tone travelling at 330 m/s. Calculate the frequency of the fundamental wave.
4.125 Hz
264 Hz
26400 Hz
412.5 Hz
The figure represents a string of length L, fixed at both ends, vibrating in several harmonics. Which string shows the 4th harmonic?
A
B
C
D
E
The figure represents a string of length L, fixed at both ends, vibrating in several harmonics. Which string shows the 3rd harmonic?
A
B
C
D
E
The figure shows several modes of vibration of a string fixed at both ends. The mode of vibration that represents the fifth harmonic is
1
2
3
4
None of these is correct.
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
80 m/s
0.16 km/s
0.24 km/s
0.32 km/s
0.96 km/s
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?
2.0𝑚
1.0𝑚
1.5𝑚
What can you say about two points between 2 nodes?
All particles between nodes are in phase.
All particles between nodes are out of phase.
All particles between nodes are π out phase.
All particles between nodes are 2π phase.
The picture shows a wave at t = 0
What can we say about the displacement of the particles at t = 4f3
it will be the at same displacement (same image as above)
it will be a shift π displacement (opposite to the image as above)
they will have 0 displacement
(horizontal flat line)
