初2上学期物理题(声)甲乙2人相距2900米,甲在水中击打水面的同时,打开手电,乙看到光后开始记时,经过2秒后听到从水中传来的声音.声音在水中的传播速度是多少?(光速为3*10的8次方/秒
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 12:27:25
![初2上学期物理题(声)甲乙2人相距2900米,甲在水中击打水面的同时,打开手电,乙看到光后开始记时,经过2秒后听到从水中传来的声音.声音在水中的传播速度是多少?(光速为3*10的8次方/秒](/uploads/image/z/4955190-6-0.jpg?t=%E5%88%9D2%E4%B8%8A%E5%AD%A6%E6%9C%9F%E7%89%A9%E7%90%86%E9%A2%98%EF%BC%88%E5%A3%B0%EF%BC%89%E7%94%B2%E4%B9%992%E4%BA%BA%E7%9B%B8%E8%B7%9D2900%E7%B1%B3%2C%E7%94%B2%E5%9C%A8%E6%B0%B4%E4%B8%AD%E5%87%BB%E6%89%93%E6%B0%B4%E9%9D%A2%E7%9A%84%E5%90%8C%E6%97%B6%2C%E6%89%93%E5%BC%80%E6%89%8B%E7%94%B5%2C%E4%B9%99%E7%9C%8B%E5%88%B0%E5%85%89%E5%90%8E%E5%BC%80%E5%A7%8B%E8%AE%B0%E6%97%B6%2C%E7%BB%8F%E8%BF%872%E7%A7%92%E5%90%8E%E5%90%AC%E5%88%B0%E4%BB%8E%E6%B0%B4%E4%B8%AD%E4%BC%A0%E6%9D%A5%E7%9A%84%E5%A3%B0%E9%9F%B3%EF%BC%8E%E5%A3%B0%E9%9F%B3%E5%9C%A8%E6%B0%B4%E4%B8%AD%E7%9A%84%E4%BC%A0%E6%92%AD%E9%80%9F%E5%BA%A6%E6%98%AF%E5%A4%9A%E5%B0%91%3F%EF%BC%88%E5%85%89%E9%80%9F%E4%B8%BA3%EF%BC%8A10%E7%9A%848%E6%AC%A1%E6%96%B9%EF%BC%8F%E7%A7%92)
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