要過程，有步驟
1.)聲音遇到障礙物能向相反方向傳播。一個同學向一口枯井的井底大喊一聲，經過1.5s聽到回聲，那麼這口枯井的深度大約多少米?(聲速按340m/s計算)
f2物理計算題1題 急急 明天要交
2010-09-17 2:45 am
回答 (2)
2010-09-17 2:51 am
✔ 最佳答案
Let the depth be x mDistance travelled by the sound wave = 2x m
340 (1.5) = 2x
x = 255
so the depth is 255 m.
2010-09-17 2:55 am
(1.5x340)/2
=510/2
=225m
2010-09-16 19:58:48 補充：
because聲速按340m/s計算,and1.5s聽到回聲,so1.5sx340=聲音在枯井來回的雖離,
即2口枯井的深度,so除2=1口枯井的深度.
=510/2
=225m
2010-09-16 19:58:48 補充：
because聲速按340m/s計算,and1.5s聽到回聲,so1.5sx340=聲音在枯井來回的雖離,
即2口枯井的深度,so除2=1口枯井的深度.
收錄日期: 2021-04-13 17:31:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100916000051KK00863