Which expressions are correct in the standard ideal approximations for the speed of sound?
Select all that apply

Question

Which expressions are correct in the standard ideal approximations for the speed of sound?

G1 Physics · Accepted Answer

For a fluid, v = √(B/ρ). For a thin elastic rod, v = √(Y/ρ). For an ideal gas under Laplace's adiabatic correction, B = γP, so v = √(γP/ρ). Using the ideal-gas relation, P/ρ = RT/M, we also obtain v = √(γRT/M). Therefore all four statements are correct.