一件物件被磁化左,會唔會兩邊都係同一個pole? ,eg. both sides are south pole.
& 磁化左既object 會唔會attract and repel magnets?
收錄日期: 2021-04-13 15:08:22
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080213000051KK05477