Practice Sound (7) - Sound

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11 questions

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6 sample questions

Question 1.
What is sound?
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Think about how music is created.
Question 2.
What do we call sounds below 20 Hz?
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Think of a frequency range.
3Question 3.
What is the speed of sound in air at 20°C?
- 343 m/s
- 1500 m/s
- 5000 m/s
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Remember the value for air specifically.
4Question 4.
True or False: Sound can travel through a vacuum.
- True
- False
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Think about where sound is heard.
Question 5.
You are at a concert, and you measure an echo returning after 0.3 seconds from a wall. If the speed of sound is 343 m/s, how far is the wall?
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Consider that the time includes the trip to the wall and back.
Question 6.
A sound wave has a frequency of 500 Hz and a wavelength of 1.5 m. Calculate its speed and verify against the equation v = f × λ.
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Make sure to apply the formula correctly.

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