一平面简谐波的表达式为y=0.025cos(125t?0.37x),求其角频率w,波速v和波长a,

y = 0.025 cos(125t ? 0.37x) y = 0.025 cos(ω t ? ω x / v) y = 0.025 cos(ω t ? 2π x / λ) 角频率 ω = 123 /s ω/v = 0.37，波速 v = ω/0.37 = 332.4 m/s 2π / λ = 0.37，波长 λ = 2π / 0.37 = 17.0 m