Multiple choice

Which of the following statements about sound is incorrect?

  1. Sound needs a medium to travel.

  2. Speed of sound is fastest in gases and slowest in solids.

  3. Sound of frequency below the audible range is called infrasonic sound.

  4. Excessive sound in the environment causes noise pollution.

  5. Sound is produced by vibrating objects.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed of sound is fastest in solids and slowest in gases.

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