The speed of an echo: 0.0080s
The temperature: 23 degrees Celsius
The length of the tube that the sound was played in is: 113cm.
收錄日期: 2021-04-21 17:01:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160220222537AArLrQx