Multiple choice

Sound travels faster in

  1. dry air than in water

  2. wood than in iron

  3. iron than in air

  4. hydrogen than in water
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sound travels fastest in solids because molecules are tightly packed, allowing vibrations to propagate quickly. The speed of sound is approximately 5130 m/s in iron (solid), 1482 m/s in water (liquid), 343 m/s in air (gas), and about 1270 m/s in hydrogen. The denser and more elastic the medium, the faster sound travels through it.

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