解答上說小球在水平方向不受外力作用所以質心水平位移為0，但是碗壁不是會給球正向力嗎？碗不是應該向右移嗎？

ACD 如右圖,一個質量 m 的小球自半徑為R的半球形碗邊 緣靜止釋放,若碗與地面、小球與碗之間的摩擦力 略不計,已知碗的質量M,則下列敘述哪些正確? (A)小球滑至底部的過程中,小球與碗的質心水平位移為 零 (B)小球滑至底部的過程中,小球與碗的質心鉛直位移為零 (e)小球滑至底部的過程中,碗的位移量值為 mR m+M R 2mR 容量 (D)小球滑至碗另一端最高處的過程中,碗的位移量值為 (E)小球滑至底部的過程中,小球與碗的質心位移量值為 m+M MR m+M 。 〔明倫高中]

這兩題是為什麼

t 3. ( 4. ( 43 D 小婷控制雙眼皮的基因為Rr,附圖為小婷產生卵細胞過程中出現的 兩對染色體排列,已知R等位基因的位置,則『等位基因應該位於 哪一個位置? (A)甲 體 (B)乙 (C)丙 R 丙 丁 工人床(A) (D)丁 →豌豆開紫花者對開白花者為顯性,以P代表等位基因,現在有一棵開紫花的豌豆 植株,欲知其基因型為PP或Pp,最好利用哪一個基因組合的豌豆花粉與此植物 16. 交配? 宝 (A)PP (B) Pp 某9 (C)pp (D)以上皆可 康力 hb 136

想問第七題，謝謝🙏

1. 兩函数相交於:(x=-4)=-x+2 0 = -x+2 x=2 S (x+2)-(x²-4)dx 13(x=x+6)dx SONTEX X=021 x x+2x-1 ~= x(x+2)+ S21(-x-x+2x) |dx| x²+x-6= 0 x÷4=0 (x+3)(x-2)=0 a X=11-2 二 (x+2) (x-2)=0 0274 商用微積分 = [x-x+6x] |23 習題 7-5 2125 = 20.8333 = 4 3 求1~5題各曲線所圍成區域的面積。 x²+2x+3= x²-|1. y=x²-4, y=-x+2=2 rX²=rX4; o 3. y=−x²+2x+3, y=x²−1 = 9 4 5.y=e`-1、y=- --1與 x-軸 2(X-2)(x+1)=0 6.求y=ex. i-x=201 et 12 b ·15 37/3 = 3.0833 2.y=x²,y=x²+2x²-2x 4.y=x²,y=2x-x² 215 4. 兩函數交於: x² = 2x= x² 1、xy=1、x=1與x=2等圖形所圍成平面區域的面積。2X-2X=0x=01 2f(xrex+3) 求y=2*.x+y=1、x=1等圖形所圍成平面區域的面積。 -(x²-1) d x =(2x+2x+4)dx y=1-x 19号+2460966 函數的平均值 号:9# 2x(x-1)=0 定義 老

請問第25題為什麼不能選B🙏

of the United 全新試題 建國中學 鳳山高中 ◎第四段課文重點 (B) in show love for others (C) through TV programs. (D) upon 全新試題 (1)介系詞應用 (2)副詞應用 (3)名詞子句 23 23. Studying history (A) likes (B) dislikes traveling in time to the past; we can learn from the past and avoid making the same mistakes. 全新試題 (C) is like (D) is alike and achieve more. 新營高中 (C) farther (D) further (24. I ask you to keep climbing because you will see (A) far D③The 25. The plan change it. (B) fur we expand our business all over Asia sounds risky, so I think we should 全新試題 different (A) that 新試題 III. 綜合測驗 are very ※第一篇 峰高中 高中 (B) which (C) what (D) about which 1. to Established in 1984, TED is a nonprofit foundation that helps spread new ideas around the world. In the beginning, the foundation held conferences and invited thinkers from many different come and speak. Some speakers were experts and researchers in medicine. Others were knowledgeable 2. were highly respected giants in business. Each of them was given eighteen philosophers. minutes to present their ideas. The speakers' talks were filled with valuable and fun insights that often audiences with knowledge 3. entertainment. popular. 4. they did not really start a revolution of

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求解

(A) We are expected (C) What is expected (B) It is expected (D) It will expect 2. Last year, the festival attracted many people, and the number of tourists is a peak on the day of the fireworks display. reported (A) that reached (C) to reach (B) to have reached (D) that has reached

求解

t- A 有機的 (A) decides (B) is decided (C) will decide (D) decided 5. Mrs. Pym doesn't trust the products sold in supermarkets; she only buys organic products from a family- (A) owning farm. (B) own (C) owns (D) owned 1 句子合併與改寫 (改寫成It is....)

求解

t- A 有機的 (A) decides (B) is decided (C) will decide (D) decided 5. Mrs. Pym doesn't trust the products sold in supermarkets; she only buys organic products from a family- (A) owning farm. (B) own (C) owns (D) owned 1 句子合併與改寫 (改寫成It is....)

VSEPR裡是什麼結構？

H₂O

求解感謝

tomph = 1-X +x+x 1 已知4HBr(g)+O2(g)→2H2O(g)+2Brz(g) 的速率定律為r=kPHB,Poz。 在 400 °C 時,容器內含3 莫耳 HBr與1莫耳O2,測得總壓為1大氣壓,而反 應發生時,速率為。溫度不變下,若在反應前又加入8莫耳He,測得總壓 為2大氣壓,則反應發生時,速率為的多少倍? 4 8 (A) 1 (B) (C) (D) 3 4 4HBr+O2→ 2H2O+2B12 O 3.1