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WorksheetsWaves and Sounds
Total questions: 7
Worksheet time: 7mins
The diagram shows a water wave in a ripple tank.
The wave has a speed of 12 cm/s at R.
The wave crosses a boundary PQ where the distance between crests changes from 3.0 cm to 1.5 cm.
What is the speed of the wave at S?
3.0 cm/s
6.0 cm/s
12 cm/s
24 cm/s
A girl, standing 150 m in front of a tall building, fires a shot using a starting pistol. A boy, standing 350 m from the girl, hears two bangs 1 s apart.
From this information, what is the speed of sound in air?
300 m/s
350 m/s
500 m/s
650 m/s
The diagram shows the refraction of water waves as they cross a boundary in a ripple tank.
What causes this refraction?
a change in frequency due to a change in depth
a change in frequency due to a change in wavelength
a change in speed due to a change in depth
a change in speed due to a change in frequency
A flash of lightning and the corresponding thunder clap are detected 6 s apart. It is calculated that the lightning struck about 1800 m away.
On which assumption is the calculation based?
Light reaches us almost instantaneously, but sound travels at 300 m/s.
Light travels 300 m/s faster than sound.
Sound reaches us almost instantaneously, but light travels at 300 m/s.
The sound of the thunder was emitted 6 s after the flash.
The diagrams show different views of a water wave in a ripple tank.
Which letters represent a wavelength and a wavefront?
P: wavelength, R: wavefront
P: wavelength, S: wavefront
Q: wavelength, R: wavefront
Q: wavelength, S: wavefront
A ripple tank is used to demonstrate refraction of plane water waves.
Waves in deep water have a wavelength of 1.2 cm and a speed of 9.6 cm/s. The wavelength of the waves in shallow water is 0.8 cm.
What is the speed of the waves in the shallow water?
6.4 cm/s
8.0 cm/s
9.6 cm/s
14.4 cm/s
Waveforms are shown on a cathode-ray oscilloscope for a flute and a guitar playing the same note. The oscilloscope settings are the same for both waveforms.
What is the difference between the two sounds?
the amplitude
the frequency
the quality (timbre)
the wavelength
