声速除以频率即为波长.
答案是：0.725m
频率为2000Hz的声音,在水中的声速为1450m.s-1,则它在水中的波长为
频率为2000Hz的声音,在水中的声速为1450m.s-1,则它在水中的波长为
物理人气：300 ℃时间：2020-03-23 22:43:26
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