音叉每秒振動300次在空氣中聲速為360M請問波長?
回答 (1)
2015-11-25 8:54 pm
L = 360/300 = 1.2 meters
收錄日期: 2021-04-30 20:17:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20151124235937AAED2hQ