428085
Description
Quiz by ed.wilson89, updated more than 1 year ago
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Question 1
Question
When a sound source approaches a stationary observer, the frequency of the sound source:
Answer
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Becomes louder
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Becomes quieter
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Appears louder
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Appears quieter
Question 2
Question
What is 20km/h in m/s?
Answer
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200m/s
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20000m/s
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5.55m/s
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333.3m/s
Question 3
Question
In the formula f'=\(\frac{v±vo}{v±vs}\)f, v stands for:
Answer
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The frequency observed by the observer
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The speed of the wave from the sound source
Question 4
Question
What, approximately, is the speed of sound in air
Answer
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400 m/s
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340 m/s
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1500 m/s
Question 5
Question
If an object is moving at the same speed at which sound travels in that medium, it is travelling at:
Answer
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Mach 1
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It is impossible to move this fast
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Supersonic
Question 6
Question
Who was the Doppler Effect named after?
Answer
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Christian Doppler, the Austrian scientist
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Johann Doppler, the German race car driver
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Madame Doppler, the French pilot
Question 7
Question
If a man is standing on the side of the road when an ambulance with its siren on passes him, when the ambulance is moving away from him the frequency of its siren:
Answer
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Becomes quieter
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Appears louder
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Becomes louder
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Appears quieter
Question 8
Question
Is an object is travelling faster than the speed of sound in that medium, it is travelling at:
Answer
-
It is impossible to travel this fast
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Supersonic speeds
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300 m/s
Question 9
Question
When a sound source is stationary, the wavelength between the sound waves it produces are:
Answer
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The same
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All different
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Smaller on the right hand side of the object
Question 10
Question
When the wavelength becomes smaller, the frequency:
Answer
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Stays the same
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Becomes smaller
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Becomes larger
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