Worksheet: Sound Waves

In this worksheet, we will practice describing sound wave propagation, defining audible frequencies, and explaining the applications of reflections of sound waves.

Q1:

Which of the following sound waves is an example of ultrasound?

  • A 3 . 5 × 1 0 3 Hz
  • B 5 5 5 5 Hz
  • C 0.01 MHz
  • D 1 . 5 × 1 0 2 kHz
  • E 7.5 kHz

Q2:

Which of the following sound waves is an example of infrasound?

  • A 3 . 5 × 1 0 3 MHz
  • B 250 Hz
  • C 0.005 MHz
  • D 0.015 kHz
  • E 4 . 5 × 1 0 4 MHz

Q3:

A string on a violin is pushed by a bow and the string vibrates at a frequency of 440 Hz. The sound waves produced by the vibrating string have a wavelength of 0.75 m. What is the speed of the sound waves?

Q4:

A string on a guitar is pulled upward and released. The string vibrates, returning to the position from which it was released 196 times per second. What is the frequency of the sound wave produced by the string?

Q5:

A sound wave in an object alternately compresses and expands it in the direction that the wave travels. The sound has a wavelength of 0.48 m. What is the distance between the point of maximum compression and the point of maximum expansion in the object?

Q6:

Which of the following sound waves is within the human hearing range?

  • A 2 5 0 × 1 0 2 Hz
  • B 0.55 Hz
  • C 0.03 MHz
  • D 1 . 5 × 1 0 3 Hz
  • E 25 kHz

Q7:

A submarine’s sonar scanner uses sound waves that reflect from objects around the submarine. The submarine emits sound waves vertically downward and detects their reflection 6 0 0 0 milliseconds later. The sea beneath the submarine is 4 7 1 3 m deep. What is the speed of the sound waves? Answer to the nearest meter per second.

Q8:

A sound wave in air is shown in the diagram. What is the wavelength of the sound wave?

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