一横波沿一根弦传播,其方程为y=-0.02cosπ(4x-50t)(SI),该波

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问题 一横波沿一根弦传播,其方程为y=-0.02cosπ(4x-50t)(SI),该波的振幅与波长分别为(  )。A.0.02cm,0.5cmB.-0.02m,-0.5mC.-0.02m,0.5mD.0.02m,0.5m

选项 A.0.02cm,0.5cm
B.-0.02m,-0.5m
C.-0.02m,0.5m
D.0.02m,0.5m

答案 D

解析
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