题目内容
一列横波沿X轴正方向传播,到达坐标原点O的波形图,如图所示,若经过2.3s从O点传到P点,P点坐标是11.5cm,此时O点的振动位移及这列波的频率分别为:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241246105303697.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241246105303697.png)
A.-1cm;2.5Hz | B.-1cm;5Hz |
C.0cm;10Hz | D.1cm;5Hz |
A
波速
,从图中可读出波长为2cm,所以周期
,
,经过3/4周期O点运动到负向最大位移-1cm处,频率
Hz
故选A
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241246105611007.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124610592845.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124610623680.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824124610670763.png)
故选A
![](http://thumb2018.1010pic.com/images/loading.gif)
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