题目内容
一列沿x轴正方向传播的简谐横波,t=0 时刻的波形如图中实线所示,t=0.2s 时刻的波形如图中虚线所示,则( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241336560763550.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241336560763550.jpg)
A.质点P的运动方向向右 |
B.波的周期可能为0.27s |
C.波的频率可能为6.25Hz |
D.波的传播速度可能为20m/s |
C
根据“上、下坡”法,P处于下坡,振动方向向上,A错误;由题意有
,
,B错误;当n=1时,C正确;波的传播速度
,D错误。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133656108791.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824133656186747.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241336562481368.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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