Why is the speed of longitudinal waves sound in solids greater than that in liquids?(a) Solids have lesser bulk modulus(b) Gases have lesser density(c) Solids have greater bulk modulus and density than gases but increase in bulk modulus dominantes over increase in density(d) Gases don’t have lesser particles in a given volume and therefore transfer sound energy slowlyThis question was posed to me during an interview.My question is based upon Speed of a Travelling Wave topic in section Waves of Physics – Class 11

Why is the speed of longitudinal waves sound in solids greater than th

1.	Why is the speed of longitudinal waves sound in solids greater than that in liquids?(a) Solids have lesser bulk modulus(b) Gases have lesser density(c) Solids have greater bulk modulus and density than gases but increase in bulk modulus dominantes over increase in density(d) Gases don’t have lesser particles in a given volume and therefore transfer sound energy slowlyThis question was posed to me during an interview.My question is based upon Speed of a Travelling Wave topic in section Waves of Physics – Class 11
Answer» CORRECT option is (c) Solids have greater BULK modulus and density than gases but increase in bulk modulus dominantes over increase in density Easy EXPLANATION: Speed is EXPRESSED as √(B/ρ). For solids B and ρ is greater than that of gases but an increase in B compensates over the increase in ρ,and thus speed is greater in solids.

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