Q1.Waves may be longitudinal or transverse.
(a) Describe the differences between longitudinal waves and transverse waves.
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...
Q1.Waves may be longitudinal or transverse.
(a) Describe the differences between longitudinal waves and transverse waves.
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(3)
(b) Radio waves are electromagnetic waves.
Describe how radio waves are different from sound waves.
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(4)
(Total 7 marks)Q2. The following figure shows the apparatus used to investigate the waves in a stretched string.
The frequency of the signal generator is adjusted so that the wave shown in the figure is seen.
At this frequency the string vibrates between the two positions shown in the figure.
(a) The wavelength of the wave shown in the figure above was measured as 80 cm
What piece of apparatus would have been suitable for measuring this wavelength?
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(1)
(b) Write down the equation which links frequency, wavelength and wave speed.
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(1)
(c) The string in the figure above vibrates at 55 Hz
Calculate the wave speed of the wave shown in the figure.
Use data given in the figure.
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Wave speed = _________________________ m/s
(3)(d) The frequency of the signal generator is increased.
This makes the wavelength of the wave change.
The wave speed stays the same.
Describe how the apparatus could be adjusted to show one complete wave without reducing the
frequency.
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(2)
(e) A student wants to investigate how the speed of a wave on a stretched string depends on the
tension in the string.
The student uses the apparatus in the figure above.
Describe a method the student could use for this investigation.
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(4)
(Total 11 marks)Q3. P-waves and S-waves are two types of seismic wave caused by earthquakes.
(a) Which one of the statements about P-waves and S-waves is correct?
Tick one box.
P-waves and S-waves are transverse.
P-waves and S-waves are longitudinal.
P-waves are transverse and S-waves are longitudinal.
P-waves are longitudinal and S-waves are transverse.
(1)
Seismometers on the Earth’s surface record the vibrations caused by seismic waves.
Figure 1 shows the vibration recorded by a seismometer for one P-wave.
Figure 1
(b) Calculate the frequency of the P-wave shown in Figure 1.
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Frequency = _____________________ Hz
(1)
(c) Write down the equation which links frequency, wavelength and wave speed.
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(1)(d) The P-wave shown in Figure 1 is travelling at 7200 m/s.
Calculate the wavelength of the P-wave.
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Wavelength = _____________________ m
(3)
(e) Explain why the study of seismic waves provides evidence for the structure of the Earth’s core.
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