题目内容
（请给出正确答案）
[单选题]
A traveling wave is shown by y=0.1cos（6x + 80t + π/3) （SI). Then the wave velocity is
A.80m/s
B.6m/s
C.480m/s
D.13.3m/s
提问人：网友darkerblue
发布时间：2022-01-07
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A、a、b两点间相位差为π/2
B、O点的振幅为-0.1 m
C、波长为3 m
D、波速为9m/s
题目内容
（请给出正确答案）
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