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5.在一個無風的下午,阿牛對著遠處的山壁喊了一聲「喂!」,不久後他聽見遠方傳回來「喂!」的回聲,則關於喊了一聲「喂!」舆回聲「喂!」的敘述,下列何者錯誤?(A)兩聲波播時均需要介質 (B)兩聲波遇到障
問題詳情
5.在一個無風的下午,阿牛對著遠處的山壁喊了一聲「喂!」,不久後他聽見遠方傳回來「喂!」的回聲,則關於喊了一聲「喂!」舆回聲「喂!」的敘述,下列何者錯誤?
(A)兩聲波播時均需要介質
(B)兩聲波遇到障礙物均會反射
(C)兩聲波均屬於超波的一種
(D)兩聲波響度(音量)的大小均與其振幅有關
參考答案
用户評論
【用戶】
何羽晴
【年級】國二下
【評論內容】A 聲波皆屬力學波(需要介質傳遞)C人耳能聽到,所以不是(聽力範圍20~20000Hz)
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【32~33】 Jack, Sakura and their parents were in the living room last night. Jack wasplaying with
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