初二物理回声测距
第一空填"反射",画图如下:
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``````````(回来)↓ ↑(碰到壁,反射)
````````````````↓ ↑
````````````````↓ ↑
(传到人这里340m)↓人↑(声波从这里开始传)
(继续传播)``````↓ ↑(再次传到人这里,总共1。 5秒,510m)
````````````````↓ ↑
````````````````↓(反射)↑
-------------------------------------
声波走了一个来回(2趟),所以两峭壁间的距离...全部
第一空填"反射",画图如下:
------------------------------------
``````````(回来)↓ ↑(碰到壁,反射)
````````````````↓ ↑
````````````````↓ ↑
(传到人这里340m)↓人↑(声波从这里开始传)
(继续传播)``````↓ ↑(再次传到人这里,总共1。
5秒,510m)
````````````````↓ ↑
````````````````↓(反射)↑
-------------------------------------
声波走了一个来回(2趟),所以两峭壁间的距离应为510/2=205m。
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