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範例:空氣中的聲波

一波沿x軸+x向(向右)行進,質點振動位移y向右為正,向左為負,在時刻t=0的y=y(x,0)的函數圖如圖所示,波速為50cm/s。(1)圖上哪些位置是密部?哪些位置是疏部? (2)求此行進波的頻率?


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Posted in 聲波的傳播.

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By admin – 2009 年 10 月 07 日

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