A pressure disturbance has a bulk elastic response

A fluid has adiabatic bulk modulus 1.44×10⁹ Pa and equilibrium density 1000 kg/m³.

What is the speed of a small-amplitude sound wave?

Organize the givens & assumptions

Bs = 1.44×10⁹ Pa
ρ = 1000 kg/m³

Homogeneous fluid at rest, linear longitudinal sound, negligible viscosity and dispersion; use the supplied adiabatic bulk modulus for the acoustic response.

A $120\ \mathrm{m/s}$
B $1.2\times10^6\ \mathrm{m/s}$
C $1200\ \mathrm{m/s}$
D $1.44\times10^6\ \mathrm{m/s}$

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