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作者 mystage 在 PTT [ Physics ] 看板的留言(推文), 共273則
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17F推: 剛體只要接觸面是剛體就行,穿透處不需要是剛體06/06 11:48
6F推: 因為輪子不是剛體05/11 06:51
9F推: 粒子找不完才是正常的吧,要不然夸克是什麼東西組成的?04/20 22:07
7F推: 那個角動量影響太小,光水的阻力就可以讓它看不見04/09 22:30
8F→: 舉個例,在台灣把浴缸塞子拔起來,漩渦是順時還逆時?04/09 22:31
9F→: 答案是不一定,因為科氏力影響小於其他因素04/09 22:32
9F推: 應該說穿透力這個詞定義不清。如果是紅光跟藍光,穿過大03/18 13:52
10F→: 氣層的能力是紅光好。如果對於身體,x光可以穿過肉體,但03/18 13:52
11F→: 是紫外光不行。所以討論這個問題得先定義前提。03/18 13:52
67F推: 近代乃至於量物,也有人過不去那個坎,就是因為跟人類自03/05 06:30
68F→: 己的體驗差距太大,機率的表現方式大違原本我們用來架構03/05 06:30
69F→: 這個世界觀的直覺。走到這裡,我們相信數學能幫我們解決03/05 06:30
70F→: 問題。03/05 06:30
71F→: 不過一旦走進數學而不能驗證,那就趨近信仰,跟其他宗教03/05 06:32
72F→: 提出一個合理解釋說明他們的神存在是同一道理,因為都只03/05 06:32
73F→: 是相信。03/05 06:32
74F→: 到這裡,我們就知道兩件事。第一,人力終有盡時,所以物03/05 06:38
75F→: 理學家也有信教的人,第二, "相信"即為一部份的"真實"。03/05 06:38
76F→: 這個有點走向唯心論,不過至少是心裡,也就是這個人用以03/05 06:38
77F→: 體會人生的真實。03/05 06:38
78F→: 我本身沒信宗教,所以嚐試用自己的體驗去構築我學到的一03/05 06:41
79F→: 切,而導出的結論,歡迎參考。03/05 06:41
34F推: 如果以直覺,比重選小於一的答案。不過事實是本題無解02/26 00:58
7F推: 先想圓環旋轉對觀察者有什麼影響,我個人認為環的大小還01/17 09:38
8F→: 是一樣。01/17 09:38
9F→: 另外電流是人類自己想的,原本傳遞速度就幾乎是光速了01/17 09:39
13F推: 可能是在說第一句吧,我第一句的意思是,從圓環的垂直面01/18 14:52
14F→: 上看一個圓環邊以切線接近光速轉動的環,對觀察者而言,01/18 14:52
15F→: 我覺得環的大小不會變,因為眼睛看到的光,還是從圓環實01/18 14:52
16F→: 際位置反射出來的。光的頻率,也就是顏色可能不一樣,但01/18 14:52
17F→: 側面看的圓環大小應該不會變。01/18 14:52
18F→: 至於圓環會不會被扯得粉碎,就不是這裡討論的了。01/18 14:54
19F推: 補充,剛剛想了現實狀況的環境,怎麼高速做圓周運動?想01/18 15:19
20F→: 到粒子加速器跟黑洞事件視界的周邊。如果是黑洞的例子,01/18 15:19
21F→: 好像圓環會比較小呢。01/18 15:19
2F推: 線的向心力的垂直分量等於重力,你要問這個嗎?01/14 13:09
5F推: 你有做過乾熘實驗嗎?01/06 13:45
6F→: 這個紙捲內部相當於高溫高壓的乾熘,會噴氫氣,然後是燃01/06 13:47
7F→: 燒反應。01/06 13:47
8F推: 然後然後到噴氣那時是壓縮的水蒸氣跟二氧化碳從底面缺口01/06 13:57
9F→: 噴出。那個噴氣沒有著火,所以是不可燃氣體。而且因噴射01/06 13:57
10F→: 流把空氣帶走,火燄也同時被帶走減少了一些。以上01/06 13:58