作者查詢 / yeahhuman
作者 yeahhuman 在 PTT [ Physics ] 看板的留言(推文), 共812則
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4F推:但是我看那篇科學人,他提到契忍可夫輻射01/04 01:02
5F→:他就是根據量不到這輻射來推斷微中子並沒有超光速01/04 01:02
6F→:因此一樓的講法至少在科學人那文中不成立01/04 01:03
7F→:他認為從來都沒有跑比較快,不管在哪種介質01/04 01:04
1F推:藍燄是不完全燃燒,你會有誤解應是因為藍燄照理說溫度較12/26 16:24
2F→:高,如果是看黑體輻射的話確是如此,但火燄不是這樣12/26 16:25
1F推:磁鐵不是單純N和S,要把它當成無數的小磁鐵12/22 05:27
14F推:現在好像是在說 higgs的某些decay mode有看到蹤跡?12/13 21:22
20F推:大致上是說現在所有decay mode總合是2.3個sigma12/13 21:48
21F→:要等之後的資料量夠多才能給更好的結論12/13 21:48
22F→:然後Higgs的mass鎖定在115.5~131GeV 應該是這樣12/13 21:49
26F→:一般要5個sigma才算明確看到12/13 21:50
14F推:為了未來的經費,作研究不是吃土就能活的12/12 22:49
15F→:也不是挖土就能蓋出LHC的12/12 22:49
5F推:許多粒子都會衰變,但可能是強,電磁,未必牽涉到弱作用12/09 03:00
6F→:我是大概這樣區分 有W Z e ν,都可以看作是弱作用12/09 03:01
7F→:不知道這樣分是不是完全正確12/09 03:01
4F→:要講弱力,反而不能用力思考沒錯...用弱交互作用12/08 09:29
7F推:我猜啦,底下是碳酸水嗎,如果是的話,搞不好只是沒蓋緊12/08 09:27
8F→:氣壓到一個程度就擠開瓶蓋12/08 09:28
10F推:找不到真的不是好事,以後物理界連實驗都沒得做12/03 03:33
11F→:只剩一群跟哲學家一樣的理論學家...12/03 03:34
12F→:我還真的笑不出來= = 我就是做實驗物理的12/03 03:35
13F→:目前已經沒有下一台對撞機了...ILC都還在觀望中了12/03 03:37
14F→:也就是說LHC成果不好的話,ILC大概就胎死腹中12/03 03:37
53F推:有誰能把標準模型用一千字講個大概? 標準模型本身就不12/04 21:46
54F→:簡單了,就我念標準模型的感覺是,非常多額外加的設定12/04 21:47
71F推:我比較同意樓上的那句,我真的不相信好的理論一定簡單12/05 22:00
72F→:只能說我們盡量使其簡單,使之在使用上更方便12/05 22:01
4F推:還是有差...外界對你施力 跟你對外界施力 物理上沒差11/10 06:48
5F→:但生物上有差...被動受力很難掌握力來的情況11/10 06:49
6F→:就像頭鎚從物理上來看頭撞頭 什麼爛招 可是施力方可以控11/10 06:51
7F→:制自己頭鎚的位置 很不一樣...11/10 06:51
8F→:忽然電梯撞地 我想很少人能瞬間把自己的肌肉調整到承受11/10 06:52
9F→:撞擊最好的角度跟施力11/10 06:52
10F→:就像是練柔道時 我自己護身倒地 跟人家摔我 力都一樣11/10 06:53
11F→:但被人家摔就是比較可能受傷11/10 06:54
12F推:就像是我用球丟你 矇著眼跟看著球 哪個被打比較容易受傷11/10 07:02
13F→:當然是看著球來路可以調整受力情況 在電梯裡跟這類似11/10 07:03
15F推:我想本來就不是要把30m完全抵消掉 而是有減弱算賺到11/10 13:32
16F→:因為跳起來是自己比較能掌握的 盲目等電梯撞地才受力11/10 13:34
17F→:老實說如果沒有所謂的緩衝器 等於矇面撞牆11/10 13:34
18F→:還不如在著地前 跳那一次後 曲膝準備落地11/10 13:35
19F→:我真的覺得這樣是有用的 分段吃掉衝量 總比一次全吃好11/10 13:36
20F→:即使第一次減少的動量不多 也可能讓受傷情況較輕11/10 13:37