Waves Flashcards
Why is it important to keep quiet and not make an impulsive sound such as a gunshot in avalanche country?
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Which of the following statements is false? a) A wave can have both tranverse and longitudinal components b) A wave carries energy from one place to another c) A wave does not result in the flow of the material of its medium d) A wave is a travelling disturbance e) A transverse wave is one in which the disturbance is parallel to the direction of travel
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The wavelength of a wave in a medium increase as a result of which of the following changes in parameters? a) an increase in frequency b) a decrease in frequency c) an increase in speed of the wave d) a decrease in speed of the wave
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The figure shows a wave pulse at two times. The speed of this wave pulse is a) 0m/s b) 2m/s c) 2.3 m/s d) 3.2 m/s e) 4.5 m/s
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If a string with length L and tension T is cut in half but is wound to the same tension, how will the speed of a wave on it be affected? a) the speed of the wave on the string increases by a factor of square root of 2 b)the speed of the wave on the string decreases by a factor of square root of two c) the speed of the wave on the string decreases by a factor of 2. d) the speed of wave on the string stays the same, unchanged e) Without knowing the mass of the string, it is impossible to say.
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What is the amplitude of the wave? a) 3m b) 6m c) 1.5m d) 4.0m e) need more information
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What is the wavelength of the wave? a) 3m b) 6m c) 1.5m d) 4.0m e) need more information
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What is the period of the wave? a) 3s b) 6s c) 1.5 s d) 4.0 s e) need more information
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A harmonic wave is travelling to the right on a long, stretched rope. Two points on the rope are coloured, red at point A and blue at point B. When the wave moves a little to the right, how do these points move?
a) They move with the ropes to the right
b) They move to the left
c) They move upward
d) They move downward
e) One moves upward, the other downward
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A standing wave on a long string has antinodes at points 4cm, 8cm, 12cm, 16cm. What are the wavelengths of the travelling waves that produce this standing wave
a) .78cm
b) 2cm
c) 4cm
d) 8cm
e) 12.6cm
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A string is tied down at both ends. Some of the standing waves on this string have the frequencies of 150Hz, 250 Hz, 300 Hz and 350Hz. There are no standing waves with frequencies between 200Hz and 250Hz. What is the fundamental frequency of the string and the frequency of the third harmonic
a) 150Hz, 300Hz
b) 100 Hz, 250Hz
c) 100Hz, 150 Hz
d) 50Hz, 200Hz
e) 50Hz, 150Hz
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Waves are typically characterised by frequency, angular frequency, period, wavelength and amplitude. Which of these pairs of parameters are related to eachother in a linear fashion?
a) period and frequency
b) period and angular frequency
c) frequency and angular frequency
d) wavelength and period
e) amplitude and frequency
c and d
