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範例:聲波反射與聲速[91學測補考]

某人站在一面大磚牆前80 公尺處，以木槌敲擊木塊，每當聽到磚牆反射的回聲時，立即再次敲擊。若第1次敲擊與第21次敲擊的時間間隔為10.0 秒，則當時的聲速約為多少公尺/ 秒﹖(A) 160 (B) 180 (C) 320 (D) 340 (E) 360。[91學測補考]

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Posted in 歷屆學測(推甄)考題, 波的性質.

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By 張慶堂 – 2015 年 01 月 14 日

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