作者查詢 / Vulpix
作者 Vulpix 在 PTT [ Physics ] 看板的留言(推文), 共1687則
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1F推: 變分不是只沿著Lorentz轉換做,所以變分不須要是零。04/01 23:33
29F→: uncertainty principle不是一直都跟測量無關嗎!?03/30 12:56
1F→: 如果是子彈走的距離,你算功的時候還要考慮摩擦力推動鋼板03/28 03:35
2F→: 的那部份。所以要算力學能損失的話,直接算鋼板厚度。03/28 03:37
5F推: 這是因為平直空間的調和函數有球均性吧。03/27 14:29
14F→: 因為摩擦力也作功吧?03/26 16:58
15F→: 不對,我在說什麼...摩擦力沒做到功。03/26 16:59
1F→: 你是不是沒算水的力學能?03/19 16:23
6F→: 想想圓柱體下方的水03/19 17:26
7F→: 水面沒上升不代表水沒動,水沒動是指水硬梆梆的。03/19 17:32
1F→: 串聯的時候應該是一起充飽的吧。03/08 22:16
24F推: 純推樓上!我也覺得畫v-t很好做。03/08 10:06
1F推: 用鏡像法去做,像是一個球內的均勻帶電圓環。03/02 03:08
14F推: 電荷面密度用電場就可以推了啊。03/07 23:36
3F→: 看懂教科書的話,二應該更實用點。簡單的PDE可以02/24 20:32
4F→: 自己解,但是要用複變的時候,有沒有學過差很多。02/24 20:34