作者查詢 / madturtle
作者 madturtle 在 PTT [ ask-why ] 看板的留言(推文), 共169則
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29F推:那個影片...我總覺得大部分人的敘述都沒有錯阿12/31 15:52
1F推:所以國中開始都把除法寫成分數避免爭議12/31 15:25
2F→:看到這種小學問題實在...12/31 15:29
1F推:翻成數支清楚多了...抓周不是嬰兒習俗和選舉有何關係=_=12/28 15:41
13F推:單純是練習多寡的問題。父母有義務和小孩對話;12/28 04:11
14F→:成年人好面子,相較之下小孩反而敢講,練習機會多12/28 04:12
4F推:「人口少班級人數自然能減低」←錯了12/06 22:48
5F→:人口減少的結果是學校裁班,不會因此變小班教學。12/06 22:52
2F推:以這種小強的數量...應該是有人定期在噴殺蟲劑吧=_=11/22 02:58
3F→:因為看你沒噴殺蟲劑所以集體躲到你家,但現在殺蟲劑是11/22 03:02
4F→:只要踩過隔一段時間就會脫水而死, 就變成集體死在你家11/22 03:03
13F推:樓上不對吧,跳了之後電梯落下速度會加快阿08/18 14:52
14F推:跳之前,一屈膝腳就會離開地面08/14 15:28
24F推:屈膝會離開地面是因為動量守恆08/15 14:42
25F→:不管怎麼動,你的質心和電梯之間的相對位置不會改變08/15 14:43
58F推:火車我覺得是因為,熱機雖然剛開始效率很差,05/28 23:16
59F→:但可以用理論推知它的負重、速率遠大於馬匹05/28 23:18
60F推:簡單的說,原po的兩個例子從當時科學來看,05/29 01:10
61F→:是「理論上可行但技術上有困難」的情況05/29 01:11
34F推:V=IR 若R=電線的電阻,那V就是"經過電線的電壓降",04/10 04:09
35F→:而非原po所說的幾萬伏特。04/10 04:10
36F推:因為定功率所以電壓提高電流降低<--正確04/10 04:17
37F→:舉例來說,若輸出電壓變為兩倍,會使總電流減半、04/10 04:26
38F→:電線兩端電壓減半、電線損耗的功率(I*V)降為原來的1/4。04/10 04:27
39F推:忽然發現很多人應該是誤解原po對"電線"的定義...04/10 04:30
40F→:他說的應該是"台電->用戶"中間的這段"電線"04/10 04:32