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問題的種類

物理 高中

(第一張照片)守恆的概念是沒問題的,但換符號好像有點問題,mg是怎麼換成mV/r的???還有a是怎麼換成V^2/r的???感覺是我前面換算學得不太好的關係🥺 (第二張照片)想知道c選項的算式是怎麼來的?

範例3 圓周運動的力學能守恆 雲飛車是一種常見於主題樂園中的遊樂設施, ao 其軌道通常有如圖所示的迴圈。若考慮正圓的迴 圈軌道,且軌道可視為在一鉛直面上,雲霄飛車 的車廂在沒有動力驅動之下,沿著軌道內側繞行, 且軌道只能提供向心力,摩擦阻力可忽略,重力 加速度為g,則當車廂可沿整個圓圈軌道繞行時,車廂在軌道最低點的加速度量值至少 為何? (A) 2g (B) 3g (C) 4g (D) 5g (E) 6g 向心力: V₁ F=mg= m JJR VH R + a₁ = JEJR (JSJR) R V₁ R 1=5g A.0) 願選一條長為R的繩子綁住一個石塊,讓石塊一開始在鉛直面上作圓周運 動,石塊的位置可由石塊—圓心連線和水平線夾角表示,如右圖所 Mo 示。若石塊在最低處的速率改為 7gR g為重力加速度,則石塊轉 2 到何處時會脫離如圖所示之圓形虛線軌跡?(已知sin37°=0.6) (A)=30° (B)=37° (C)=45°(D)=53°E=60° R my mg cose 79R 2 ① 力学能守恆 /m() :/mv+mgal1+sine) myR 2 → v² 1 gk (3-4 sino) ② 圓周運動(向心力:張力、動) T+ mg sino - V = 1mg (3-4 sino) →繩鬆⇒7:0 →脫離:與最低點高度差h " R+R Sind ⇒ 0+mg sine = 1 mg (3-45/40> : R(1+ Sine) => sino 0-300 【107. 指考】

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數學 國中

求解🙏

( 34.~35.) Hi, I am Jamie. My special place is in a big apple tree by my grandparents' garden. My grandpa built it for my sister and me. To get there, I have to climb up a ladder. Grandpa built it with wood and it also has a roof, so we don't get wet when it rains. I like to sit inside when it rains. The sound makes me comfortable. Sometimes I have food with my sister and cousins there. One day, I wanted to spend the night there, but it was really dark. I was afraid, so I went back to the house. vobiulp? Hi, my name is Karen. My special place is in a park near my home. I go there with my friends. It is not in the center of the park, so few people go there. There is a bench under a tree, and we often sit and talk there. It makes us very happy. There is a beautiful fountain and we often play water in it. It is a great place when the weather is hot. The tall trees there can help us keep out of the sun. In the spring, there are many beautiful flowers. It is more like the country than a park in the city. ladder 梯子 wood木材 roof屋頂 fountain 噴泉 34. Which is the right picture of the special place? (A) Jamie's m.q08 (B) Jamie's uto2 mw onex99W DD 21 Did b Yoineetblirb JUC r t'nob uoY chowezuor apnhd ne .2M dor by glori abbl (C) Karen's (D) Karen's 91blirb ynoma ob of mert b9b not agit aw? smol law by slows bas ov w.moo.zhit.www Jiziv To 1200-0588-40 ( ) 35. Which is NOT true? almid (A) Karen's special place is in the city. wla naniol" bina bom e vodol25 (B) Karen likes to play water with her friends. W mid 10 taong i sno zirli (C) Jamie stayed in his favorite place for nights. (D) There is a garden next to Jamie's special place. smol Jow? (A) M() .smita coin2.0

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英文 高中

想問第四題為什麼不能選C 謝謝🙏

111. 綜合測驗:15% • pose drult qi avil or salil olgooq vasi 26 have fascinated 1. of a e part lunches daily to The dabbawalas of Mumbai, i, India, have ated many people. They are boxed-lunch delivery organization that brings around 200,000 office and factory workers. Dabbawalas provide a very useful service. Since most Mumbai residents live in areas far from their jobs, it's inconvenient for them to bring their lunches on cramped public transportation. Dabbawalas always deliver the lunches the right location. They're able to do this because of their nearly-3./ operating system. collects around Each geographical area* employs around twenty-five dabbawalas, 4. 8, and details. outer delivery of 2. and to thirty lunch boxes boxes. Dabbawalas write special numbers and characters on each container's 5., they rarely lid to indicate the neighborhood, building, deliver a lunch box to the wrong place. Without a doubt, the service performed by these dabbawalas is a true model of success. el of successivo a god m' .01 (A) It wasn't mentioned in the passage. 90.87 Ji a geographical area 註: home-making (C) home-made BID 2251 (C) 1. (A) home-make eded (B) home-maki (D) making-home SD) 2. (A) at risk (C) by chance (bai (D) on time (B) & (A) classic list! (B) all the time (solo (C)(A) each of whom A (B) flawless (B) one of which (C) each of them JESSIES anoia ( handled 101 airli(D) swift (D) they all

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公民與社會 高中

請問為什麼D不對

據外媒報導,馬來西亞於2022年11月19日舉行國會大選,國內主要政黨聯盟中, 在野聯盟領袖安華(Anwar Ibrahim)為首的「希望聯盟」(Hope Pact)拿下82席,前線 慕尤丁(Muhyiddin Yassin)所帶領的「國民聯盟」(Perikatan Nasional)則緊追在後, 73席;而執政的「國民陣線」(Barisan Nasional)只拿下30席,雖然僅有30席,但預計 能透過選擇支持哪一個陣營來扮演重要角色。 案 W 馬來西亞下議院有222個席次,媒體報導指出,這是馬國首次出現「懸峙國會」(hun parliament)局面。獲得多數席次的希望聯盟、國民聯盟勢必得和其他政黨或聯盟合作, 能取得籌組政府所需的席次。儘管「希望聯盟」奪下最多的國會席次,但有新加坡媒體認為 「希望聯盟」與其他政黨聯盟之間存有意識形態差異,很難找到潛在的執政聯盟夥伴,因此 較難取得足夠的國會議員支持籌組政府,其他政黨團體比較可能願意與「國民聯盟」攜手合 “联合內閣之成員是由來自不同政黨的黨員所組成,因此閣員背belong的party可能 作。 有不同的政見,利益考量,易使政策制定和施政方針变Complex,故(5) 苦思刻开 平鎮高中 ) 41.目前馬來西亞國會未有政黨聯盟獲得足以組成政府的議員席次,因此需要與其他 政黨聯盟合作,共同組閣,但是共同組閣的情形下,較容易出現下列何種狀況? (B) (A)元首權力過度擴張 味麵 (C) 國會易濫用否決權 (B)施政責任不易釐清 (D)內閣任期不固定

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