alleryIn which medium does sound travel FASTEST?
AAir
BSteel
CVacuum
DWater
Answer & Solution
Correct answer: B. Steel
Sound travels fastest in solids because their particles are tightly bonded — vibrations pass quickly from one to the next.
**Order:** solids > liquids > gases.
**Example speeds:** steel ≈ 5000 m/s, water ≈ 1500 m/s, air ≈ 340 m/s.
(Vacuum is not a medium at all — sound speed is undefined there.)
Keep practising Unit 8: Fluids: Density, Buoyancy and Continuity
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