想請教此題 這裡正向力N是要額外算的 不能代N=mgcos 公式 那什麼樣的情況下才能代此公式？

有一質量為 m 之小珠,串於Y形桿上,如圖所示。該Y形桿繞鉛直軸旋轉,使小 珠維持於一固定長度h處。若小珠與Y形桿間無摩擦,則Y形桿旋轉的角速率 (1) 為何?【91指考物理】計算題 @

請問16.

II. Cloze: 20%(每題1分) 【A】 In Bangladesh, where monsoons once forced schools to shut down for months, an innovative design of "boat schools" has emerged. This project, which is __(16)_ a traditional wooden boat design, ensures that education remains accessible despite devastating floods. _ (17) providing a safe learning environment, the project has been recognized globally for its creative impact. These floating classrooms are now equipped to provide children _ (18)_ modern multimedia resources. The equipment, __(19)_ many high-tech tools such as solar-powered laptops, allows for a more interactive learning experience. The primary goal of these boats is to ensure a stable environment __(20) bridge the educational gap. If this innovative boat school project _ (21)_ today, children in flood-prone regions would not have access to regular schooling. Meanwhile, India is tackling teacher shortages through the induction of Al-powered humanoid robots like Iris. People find__(22) truly fascinating to see how these robots provide a unique chance for personalized learning and go beyond the limitations of a traditional classroom. However, this technological shift is not without debate. _ (23) some critics worry that AI might replace the essential human connection, others argue that these tools can assist every child's learning pace. Supporting this positive view, experts point out that the data-processing speeds of these robots are often much higher than __(24)___ of human assistants. The goal of using such advanced technology is to offer customized learning experiences for every child. This new model allows for flexible study schedules, __(25)_ helps every student succeed. Not only the students but also the teachers can benefit from this silicon-powered model. In the end, these two distinct models-one floating on water and the other powered by silicon-guarantee that no student is left behind. (A) arose from 7. (A) Aside from = ih D 18. (A) as 19. (A) including 20. (A) so that B21. (A) does not exist 22. (A) it 23. (A) While 24. (A) this 25. (A) it 共5頁 (B) deriving from (C) originating in (B) In spite of (C) Instead of addition (B) for (C) included (B) includes (C) in (C) such as to (D) rooted in (D) Regardless of (D) with (D) inclusive (Q) in order that (B) so as to (B) did not exist (C) were not existed (D) had not existed (B) that (C) which (D) what (B) Since (C) Unless (D) Once (B) that (C) those (D) these (B) that ✓ (C) which (D) what

想問最上面題組一怎麼看正電負電

一、題組 1. 如下圖所示,粒子由甲、乙、丙、丁四個方向射入垂直磁場中,試回答下列問題: (B) (1)粒子從甲方向,由西向東水平射入磁場,若粒子向北彎曲,則子帶什麼電? (A)帶正電(B)帶負電(C)不帶電(D)正負電都帶(E)正電或負電均可能 (B) (2)粒子從乙方向,由北向南水平射入磁場,若粒子方向不變,則粒子帶什麼電? (A)帶正電(B)帶負電(C)不帶電(D)正負電都帶(E)正電或負電均可能 。 。 。 (A) (3)帶負電粒子從丙方向,由東向西水平射入磁場,則因磁力作用,粒子會向何方彎曲? (A)向上方彎曲(B)向下彎曲(C)向北方彎曲(D)向南方彎曲(E)不彎曲 (4)帶正電粒子從丁方向,由南向北水平射入磁場,則因磁力作用,粒子必會向何方彎曲? (A)向上方彎曲 (B)向下彎曲(C)向東方彎曲(D)向西方彎曲(E)不彎曲 (D) 甲 甲 上北 乙 N 内西 南下 JS 東 ? →[ I 。 2.無限長直導線通以電流I,如上圖右,甲、乙、丙、丁為4個不同位置,與導線的距離均相同且共 平面,則: ( ) (1)關於甲、乙、丙、丁的磁場方向敘述,下列哪些正確?(多選) (A)甲、丙處的磁場方向相同(B)甲、乙處的磁場方向相反 (C)甲、丁處的磁場方向相反 (D)丙、丁處的磁場方向相同 (E)甲、乙、丙、丁處的磁場方向均相同 。 ( ) (2)若導線的電流增為2I,其方向變為向左,則下列哪些正確?(多選) (A)甲處磁場變大,乙處磁場則變小(B)甲處磁場方向為 (C)乙處磁場方向為 (D)丙、丁兩處的磁場方向與量值均相同(E)甲處磁場量值為丁處磁場量值的2倍 O , 3. 悠遊卡與讀卡機的構造可視為圖(一)。由讀卡機供應電流II產生磁場,悠遊卡中則有線圈連結著 晶片,形成一個迴路。平常悠遊卡中因為沒有電源,所以沒有電流,但當悠遊卡靠近讀卡機時 I1產生的磁場會使悠遊卡中的線圈有感應電流I2。【113.全國模考】 悠遊卡 晶片 磁力線 讀卡機 圖(一) 12 圖(二) →1 ( ) (1)若欲使更多的磁力線穿過悠遊卡中線圈,下列作法哪些正確?(應選2項) (A)將讀卡機的電流減少(B)將悠遊卡更靠近讀卡機 (C)將悠遊卡離讀卡機更遠一些(D)讓悠遊卡中的線圈平面與讀卡機中的線圈平面垂 直(E)增加悠遊卡中的線圈平面之面積, 。 ( ) (2)將圖(一)中的電流方向定義為II、I2之正方向,若希望悠遊卡中持續有感應電流I2,且與 時間t的關係如圖(二)所示,則讀卡機的電流I與時間t之關係圖形應為下列何者? (A) // (B) 4 1 □ 大學先修課程(EWANT) □ 其他(靜宜參訪紀錄) (C) 4 A

教我一二題，感謝大大

where為什麼可以修飾post-industrial economy? 前面要放the place啊？

plays an essential role in This is a symptom of Taiwan's ongoing transition into a post-industrial economy, where traditional knowledge and hands-on skills are becoming increasingly rare.

這題D為什麼對 E哪里錯🙏

C如何知道根號3小於PQ長

請問第24題應該選擇哪一個選項？A或者B呢？

Question 21-25 Bitcoin, "(21) currency" that isn't recognized by any nation or bank in the world, was once dismissed as a goofy idea embraced by nerds and anti-government types. Today, it's considered either an ideal payment system for the Internet or a (22) _ Ponzi scheme. Yet it has become a scorching-hot commodity among speculators - (23)_ the Winklevoss twins made famous in the Facebook movie, The Social Network -- who are (24) the digital currency. Venture capitalists and entrepreneurs consider bitcoins the ideal currency of the digital age, with decentralized currencies and free movement of money (25) 21. A. plastic B. mint C. virtual 22. A. astronomical B. digital C. manual D. fake D. plant 23. A. for B. that C. when D. including 24. A. mining B. trading C. digesting D. recycling 25. A. globally B. locally C. functionally D. culturally

求解C選項要怎麼知道PQ長度比根號3大

)3. 若圓O的半徑為2公分,P與Q兩點都在圓周上,∠POQ=1弧度,則下列哪些敘述是正 確的? (A)55°<<POQ<60° (B)PQ的長度為2公分 (C)5公分<PQ的長度<2公分 (D)扇形POQ的面積為4平方公分(B)25平方公分<APOQ的面積<4平方公分 答案:(A)(B)(C) (P) 0.2 \x2xsin 57.3 (B) s = ro P 2X|=2 (E) € +xxxxsimbo" = 13417. 13=3.4... Q2 (C)=4/100 = 60° 70-243² 3x3x3x0560 = 4 =

求解

24. sin 20+ cos 20= 答案: 75 -17 3元 , 2555 α-320+175=0 <<2,求sine+cos= 2 3πK<>Q<4 (Sing + cost) == Sin² Q+3 二