The propagation speed in any medium depends on the density(ρ) and stiffness of the medium. The stiffness is also called the hardness or the bulk modulus of elasticity (B).
c(m/s) = [B(N/m2)/ρ(kg/m3)]1/2
19 超音波在介質中的速率,和下列何者無關? (A)溫度 (B)頻率 (C)密..-阿摩線上測驗