Which pair gives the standard expressions for the longitudinal speed of sound in a thin solid rod of Young's modulus Y and density ρ, and in a fluid of bulk modulus B and density ρ?
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Question

Which pair gives the standard expressions for the longitudinal speed of sound in a thin solid rod of Young's modulus Y and density ρ, and in a fluid of bulk modulus B and density ρ?

G1 Physics · Accepted Answer

For longitudinal waves in a thin elastic rod, For the solid rod, v = √(Y/ρ). For longitudinal waves in a fluid, For the fluid, v = √(B/ρ). The restoring elastic property is Young's modulus for the thin rod and bulk modulus for the fluid. Correct option: A.