The velocity of sound waves in four media P,Q,R and S are 18000 km/h, 900 km/h, 0 km/h, and 1200 km/h respectively. Which medium could be a liqiud substance?
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Sound travels slowest through gases faster through liquids and fastest through solids.
Here, P(18000) is solid < S(1200) is liquids < R(900) is gases.
This implies, S is the liquid substance
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s
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