题目内容
一列横波在x轴线上传播着,在t1=0和t2=0.04s时的波形曲线分别如下图所示:
①读出简谐波的波长是 m;振幅是 m。
②设周期大于(t2-t1).如果波向右传播,波速多大?
③若波速的大小为2750m/s,求波的传播方向。![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082413221314614455.png)
①读出简谐波的波长是 m;振幅是 m。
②设周期大于(t2-t1).如果波向右传播,波速多大?
③若波速的大小为2750m/s,求波的传播方向。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082413221314614455.png)
(1)8m 0.06m
(2)50m/s
(3)向左传播
(2)50m/s
(3)向左传播
①从图中可直接读出来波长:8m振幅:6cm=0.06m.②根据“上坡向下”可知
据
=
③向右传播
据
可以得到
,向左传播
据
可以得到v=50(4n+3)可以知道波向左传播(n=13).
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824132213177772.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824132213224517.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824132213271864.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824132213318759.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824132213224517.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824132213380705.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824132213442794.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824132213224517.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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