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In which medium does sound travel fastest, given the same conditions?
AVacuum
BLiquid
CGas
DSolid
Answer & Solution
Correct answer: D. Solid
1. Sound speed depends on the elasticity of the medium.
2. Solids are the most elastic, so sound travels fastest in them: $v_s > v_L > v_G$.
3. Gases are least elastic, so sound is slowest there.
4. Sound cannot travel through a vacuum at all, so that is wrong.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 5 Acoustics "Acoustics", p.68_
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