Multiple choice

Which one of the following statements is wrong?

  1. Sound travels in a straight line.

  2. Sound travels as a wave.

  3. Sound is a form of energy.

  4. Sound travels faster in vacuum than in air.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sound is a mechanical wave that requires a medium, such as air, water, or solid matter, to propagate. Because a vacuum contains no particles to transmit vibrations, sound cannot travel through it at all. Therefore, the statement that sound travels faster in a vacuum is false.

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