Practice Reflection Of Sound (11.3) - Sound

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is an echo?
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Think of an example of a loud noise followed by a quieter repeat.
Question 2.
What is the law of reflection?
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Remember the angles involved when an object bounces off a surface.
3Question 3.
What phenomenon allows sound to return to the listener after bouncing?
- Refraction
- Echo
- Interference
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Consider what happens when sound hits a hard surface.
4Question 4.
True or False: The angle of incidence is always equal to the angle of reflection.
- True
- False
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Think about how light behaves when it reflects.
Question 5.
A sound is produced at one end of a long canyon. If the echo is heard after 5 seconds, what is the distance to the cliff, given the speed of sound is 340 m/s?
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Remember to calculate the total distance using the time and speed.
Question 6.
In a concert hall, the reverberation time is too long and causes distortion. List three changes you would propose to reduce reverberation.
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Think about materials and architectural design that would help control sound.

5 more questions in this section. Enroll free to practise them all.