The velocities of sound waves in four media P, Q, R and S are 18,000 km/h, 900 km/h, 0 km/h, and 1200 km/h respectively. Which medium could be a liquid substance?
(a) P
(b) Q
(c) R
(d) S

Sound waves travel slowest through gases, faster through liquids and sound waves travel fastest through solids.

Here, $P(18000)solid < S(1200)liquids < R(900)gases$

This shows that S is a liquid substance.

So, option (d) is correct.

Updated on: 10-Oct-2022

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