Re: [無言] 你的物理老師在哭
看板StupidClown作者HenryLin123 (HenryLin123)時間7年前 (2016/09/18 01:15)推噓5(10推 5噓 22→)留言37則, 17人參與討論串2/2 (看更多)
好像很多人講到一公斤的鐵跟一公斤的棉花
我有聽過應該要選棉花
因為棉花密度比較低
受到的空氣浮力比較大
所以量起來一樣重的話(磅秤讀數)
棉花受的重力比較大
所以棉花比較重
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