题目内容
(6分)如图所示,在一条直线上两个振源A、B相距6 m,振动频率相等.t0=0时刻A、B开始振动,且都只振动一个周期,振幅相等,振动图象A为图(甲),B为图(乙).若A向右传播的波与B向左传播的波在t1=0.3 s时相遇,则( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250029024278502.jpg)
A.两列波在A、B间的传播速度大小均为10 m/s
B.两列波的波长都是4 m
C.在两列波相遇过程中,中点C为振动加强点
D.t2=0.7 s时刻B点经过平衡位置且振动方向向下
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250029024278502.jpg)
A.两列波在A、B间的传播速度大小均为10 m/s
B.两列波的波长都是4 m
C.在两列波相遇过程中,中点C为振动加强点
D.t2=0.7 s时刻B点经过平衡位置且振动方向向下
AD
试题分析:设AB间距离为s,两列波的速度为v,则由题
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002902443504.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002902458846.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002902489499.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002902505644.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002902521515.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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