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作者 mystage 在 PTT [ Physics ] 看板的留言(推文), 共273則
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9F推: 因為導線外是磁場。04/09 09:37
9F→: 科學人跟牛頓啊，我都去圖書館看。04/09 09:37
1F推: 那如果是微波呢？03/17 02:26
4F推: 第一題是B到C一樣快。第二題是108/21 22:41
10F推: 大家相信Emdrive, 相當程度是量子物理發展害的05/26 03:04
11F→: 量子把過去直觀的因果論打亂，大家學的時候，已經經歷一05/26 03:08
12F→: 次學習全新概念的經驗，所以emdrive違反動量守恆， 大家05/26 03:08
13F→: 還能接受，是不是又有新理論出現。05/26 03:08
33F推: 其實磁場有方向，可以用不同角度的測試來找出磁場的影響05/31 18:43
34F→: ，只是當初為什麼NASA驗證的時候沒找出來。05/31 18:43
11F推: 這個實驗只是要封信上帝那派的嘴巴而已。05/19 18:02
12F→: 其實大家早就接受量子糾纏的存在了。05/19 18:03
2F推: 我覺得辦不到吧01/24 23:32
5F推: 這些事情我有想過類似的問題，所以一看到這個問題01/22 21:44
6F→: 在我的認知內，這個影片應該是錯誤知識01/22 21:44
17F推: 我連實驗都有點懶，水的黏滯係數低，不會有加熱不均的問01/23 13:17
18F→: 題。要實驗的朋友，連續加熱兩次水來實驗就知道了。中間01/23 13:17
19F→: 沖水把鍋子降回水溫即可。01/23 13:17
24F推: 我以前想得是降溫問題。我想讓剛煮開的水，變成冰水，我01/24 11:28
25F→: 應該怎麼做，有同重量， 100度的水，25度常溫水，跟冰塊(01/24 11:28
26F→: 還在冰箱裡)。怎麼放才最冰？01/24 11:28
27F→: 我的結論是，先不動，把熱水放涼，因為100度的水，跟周圍01/24 11:31
28F→: 溫差75度，熱輻射還有蒸氣降溫都快，放幾分鐘後，放常溫01/24 11:31
29F→: 水(純粹想喝多一點，不放沒差)然後加冰塊，一杯涼飲就出01/24 11:31
30F→: 現了01/24 11:31
31F→: 我思考的冷卻問題，其實是加熱問題的反向。所以看到這個01/24 11:33
32F→: 影片，我直接轉化熱的吸收及放出效率，覺得她搞錯了01/24 11:33
33F推: 流言破解。剛好我要燒開水喝，就實驗一下。直接放滿是5:301/24 22:13
34F→: 9秒燒開，先放1/4燒到接近開，再放到滿燒開是5:50秒，裝01/24 22:13
35F→: 水沒停表。去掉裝水時間數秒，幾乎一樣。01/24 22:13
6F推: 光與粒子有交互作用時，能量才會發揮作用。01/20 23:02
7F→: 藍光可能比較偏紫外光那邊，沒辦法引起原子的共振01/20 23:03
8F→: 紅外光波長可能比較適合引起木頭原子的振動。我是這樣想01/20 23:04
9F→: 的01/20 23:04
10F→: 另外是紅外光的穿透力比紫外光高，有可能是這個關係。01/20 23:07
20F推: 振動方面，因為波長於粒子差距甚大，所以我覺得排除這個01/24 11:18
21F→: 可能性01/24 11:18
22F→: 更正，共振。01/24 11:19
23F→: 加熱，本質就是讓原子熱振動，所以會燒起來，是紅光讓原01/24 11:22
24F→: 子的振動比較多，這是反推回來的。為什麼一個燒表面，一01/24 11:22
25F→: 個接力才燒穿，猜測是穿透力問題。大概是這樣，純粹瞎猜01/24 11:22
26F→: 。01/24 11:22
8F→: 另外穿透力來說，紅外比紫外光高01/20 23:05
12F推: 紫外光能量高，穿透力差。紅外光能量低，穿透力強。陰天01/21 20:01
13F→: 時，紫外光被雲層擋住，但是紅外光會穿透雲層。01/21 20:01
18F推: 以人體來說，紫外線的影響是在皮膚，紅外光可以到肌肉。01/22 15:24
19F→: 不知道木頭的部份是如何，但是密度類似，我猜行為也類似01/22 15:25
20F→: 波長長的，穿透力通常比較強，短的能量高。01/22 15:26
23F推: 有可能是黑色部份吸收紅光的吸收率高吧01/24 11:12
24F→: 不確定的因素太多了，只能猜發生了什麼事而已。01/24 11:14