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34. 某車以等速度 40 m/s 朝山壁前進,在車上的人於鳴放喇叭後經 6 秒,始聽到由山壁反射之回聲,若當時聲音速度為 340 m/s,求在車上的人剛好鳴放喇叭時,車與山壁的距離為多少公尺?(A)
問題詳情
34. 某車以等速度 40 m/s 朝山壁前進,在車上的人於鳴放喇叭後經 6 秒,始聽到由山壁反射之回聲,若當時聲音速度為 340 m/s,求在車上的人剛好鳴放喇叭時,車與山壁的距離為多少公尺?
(A) 1140 公尺
(B) 1040 公尺
(C) 1020 公尺
(D) 680 公尺
參考答案
上一篇 :
71 下列那一種胺基酸含 hydroxyl group?(A)Trp (B)Pro (C)Phe (D)Thr
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