想請問第二題的解法，看不太懂，以及第三題

解 範例7-10 從一副撲克牌中抽出5張牌,請問: (1)同花(花色相同)的機率為多少? (2) 一對(兩張點數相同,另三張點數不同)的機率為多少? (3) 鐵支(四張點數相同,另一張點數不同)的機率為多少? (4)同花順(五張牌連號,且花色相同)的機率為多少? 52 張牌中抽出5張,共有C2=2598960種結果。 (1)從四種花色中先選一種,在由這13張牌中選5張,此即為同花。故機率 為 4× C¹¹³ 429 216580 C$2 33 16660 ° (2) 從 13 種不同點數中選出4種(其中一種一定為2張,另外三種各1張), C¹³ × C²±² × C²² × Cª × C¹¹× Cª × C²º × Cª 此即為一對。故機率為 C$2 396 833 、K、A 這十種,而一副撲克牌中一共有四種花色可 故機率為 C°×10. 範例 7-11 64974 (機率性質的應用) 投擲一粒公正的骰子三次。 三件中至少出現一次2點的事但 (1) A 不發生的機率。是 (2) A 發生的機率。 (3)A與B都發生的機率 (4)A或B發生的機率

（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】

請問為什麼是說蒸發，它不是加熱到一個特定溫度沸騰嗎？

3.蒸餾 (distillation) 蒸餾法是利用混合物中沸點的不同來分離物質,加熱混合物液體時,在特定溫度 時,沸點較低的物質會先蒸發出來。常見的蒸餾裝置如圖1-20。 溫度計 (蒸餾瓶) 冷凝管 出水口 Chapter 1緒論 21 一直循 承接管

這題答案是什麼？ 想請教有關農業環境與發展的筆記謝謝 因為實在抓不到重點是什麼 所以想看一下大大的筆記是怎麼寫的

CHAPTER 02 農業環境與發展 2-1 農業生產環境 2-2 臺灣農業現況及發展 2-3 世界貿易組織(WTO)與相關貿易協定對臺灣農業之影響 2-4 世界農業生產概況及發展趨勢

請問27的B選項

子吃。 是一座 包月的 三代 的島 ** -招号 Firen 25. What does Zack mean when he says. "It's not rocket science"? (A) Finishing a science report is easy. (B) Deciding on a gift is not that difficult. (C) He is smarter than Shelly and Karen. (D) Getting some good sleep is very important. (26~28) EJReading Listen to Books Are your eyes tired after you work in front of the computer for hours? Do you want to read, but your eyes really need a rest? Don't worry. We read for you. A book on EJReading only costs 3 to 15 dollars, and you can listen to it as many times as you want. What's more, with EJReading, you don't need to carry a book around. You can listen to different audiobooks anytime and anywhere on your cellphone. Book of the Month For this book, there are 4 choices: Michael Davis Michael Davis reads the story word by word in a warm voice. Ann Lee Ann Lee reads the story vividly. It's like you're $3.99 watching a movie when you listen to her. James Williams James Williams tells you the key points of each chapter and helps you get the big picture of the Word by Word Behind the Word The Trip to Lucerne By Lewis Anderson (2015) -Lewis Anderson's most famous book. -A book to change your life story. Kate Green Through looking at each character closely and explaining their actions, Kate Green helps us take a deeper look into the story. She also shares her opinions of the story with us. $3.99 $6.99 $8.99 1 : : ABOD * $10 for a Word by Word and a Behind the Word. * Place your order by June 30 to get a $5 gift card. ABOD audiobook character # vividly 1 chapter opinion & 26. Who would most likely use EJReading? likely T (A) Jessica. She is a teacher. She loves reading and often goes to the library. (B) Mandy. She is a student. She studies hard, but she hates reading in her free time. (C) Mike. He is an engineer. He loves reading, but his eyes are too tired after work. (D) Ethan. He is a cook. He enjoys listening to different songs when he's at work. ABCD 27. What CAN'T we learn from the web page of EJReading? web page (A) There are about 10,000 audiobooks for people to choose from on EJReading. (B) It costs less than 5 dollars to listen to Ann Lee read The Trip to Lucerne. (C) The Trip to Lucerne is Lewis Anderson's most famous book. (D) If you want to listen to someone share his / her ideas about The Trip to Lucerne, you can pick Kate Green. 28. Nancy read The Trip to Lucerne after it was on the market in 2015. In a study group next Saturday, she wants to share her thoughts on the story with everyone. However, although she really loves the story, she still forgets some parts of it She doesn't need to listen to every word again, and she already has her own ideas about the story.) To help herself remember the important points in some chapters in a short time, which might she choose? thought (A) Word by Word-Michael Davis. (B) Word by Word-Ann Lee. (C) Behind the Word-James Williams. (D) Behind the Word-Kate Green. cup of life

請問如何分辯共價網狀固體是屬於一度，二度，三度空間的哪一個類型（？

x原有觉 7=6. 學習概念 4 共價鍵與共價網狀固體(配合課本p.69) 1. 共價網狀固體 (1) 定義:非金屬原子間以共價鍵結合且無限延伸成一度、二度或三度空間,以此方式形 成的物質。 例金剛石(C) 、石墨(C) 、矽(Si)、 石英(SiO2) 金剛砂(SiC)…等。 (2) 共價網狀固體熔化或汽化需破壞共價鍵,因共價鍵的強度比分子間引力大,故共價網 狀固體通常硬度大且具高熔點、高沸點。 國金剛石的熔點大於3550 ℃。 化學式 結構 示意圖 金剛石 (diamond,鑽石) C 性質 ◎常見的共價網狀固體 石墨 (graphite) Chapter 2 物質的形成 69 矽 Si 1個碳原子與4個 1個矽原子與4個 1個碳原子與鄰近 相鄰的碳原子以共 3個碳原子以共價 相鄰的矽原子以單 結構價鍵結合成正四面| 鍵結合,形成平面|鍵結合成正四面體 說明「體。 網狀結構,層與層 之間並無共價鍵, 僅以微弱引力結合。 結構如同鑽石。 已賣 然界物質中最大。 用。 ②高熔點、高沸點|②硬度小,質軟, , 不具導電性, 可作為潤滑劑。 但導熱性佳。 石英 SiO2 12 1個矽原子與鄰近 的4個氧原子以共 價鍵結合,而1個 氧原子也與鄰近的 2個矽原子以共價 鍵結合。 ①無色透明、折射|①灰黑色、具導電化性安定,是一種質硬、不導電、高 熔點,可作為光纖 率大,硬度為自 性,可作電極使|半導體元素。 材料。

這幾題畫圖也看不出來⋯求解

a. $6. b. $8. B 1. Alexis, Bruno, and Camila each want an ice-cream cone. Alexis is willing to pay $12, Bruno is willing to pay $8, and Camila is willing to pay $4. The market price is $6. Their consumer surplus is 017) c. $14. d. $18. 8 6 respected. In this case, co from the goods they buy. 4 Quick -6)+(12-8)=10 : 36 6 12 x 6 = (All z B 2. If the price of an ice-cream cone falls to $3, the con- sumer surplus of Alexis, Bruno, and Camila increases by a. $6. b. $7.

大二統計學 請問畫黃色的部分要怎麼算

268 CHAPTER 6 The Normal Distribution and Other Continuous 6.5 Given a normal distribution with = 70 and o = 20, what is the probability that a. X > 110. b. X < 10. c. X< 70 or X > 130. d. Between what two X values (symmetrically distributed around the mean) are 70% of the values. 8 6.6 Given a normal distribution with μ = 30 and σ = 4, what is the probability that a. X > 38. b. X < 25. c. Find the X value such that the area to the left of X is 5% of the total area under the normal curve. d. Between what two X values (symmetrically distributed around the mean) are 40% of the values? P(Z > 2) = (1-0,9094 = 00228 P(25-1.2²) 011056 27:25-30 4 1125 5x1165 Z=30+4 1-905=0.95 (₁28-1 46.64 = 3

有人會解這題的d嗎 怎麼算都是錯的耶 卡了一星期惹🥹

小 粗細均勻,一端封閉的玻璃管內放入水銀,正立時,空氣柱為(cm,柱內氣 壓為Patm,水銀柱長為hcm,如圖A,倒立時空氣柱變為l' cm,柱內氣壓 變為P' atm,水銀柱長為hcm,如圖B。設大氣壓 Po atm 以及溫度均保持不 變,則下列敘述中正確的是(r是水銀密度)?[86.模擬考] AP<P ®< ©2Po=P+P ①38P=38P'+h ® P%=P'''。 6.04 ACDE C) P-Poth 38p:280+38h p'=yo-h381P'=38 po-38h p+ p' = 2P0 38p-38p1-38h+386 P h 水 圖A 重力 Po 圖B h chapter ② 氣體基本定律 11

可以教我怎麼記嗎 不理解 ？謝謝 希望有好心人救我😱🥹

指波浪作用所能影響的最高位 置,有些地方會出現海崖、沙 丘,或二者皆無。因其後方不 受波浪影響,所以農田、聚落 與道路開始出現。 添 海岸 海灘 前灘:低潮位到高潮位之間 後灘:高潮位以上到沙灘內緣線 濱線 沙質海灘區域與 內陸的交界線, 為海浪作用至陸 地的底界 海灘內緣線 高潮位 潮間帶 漫) 低潮位 指高、低潮位間 的陸地,易受到 海水運動影響。 指海水與陸地的交界 線,其位置隨著高、 低潮位改變,非固定 不動。 裂線 学生地 (海岸侵蚀起點) 指因海底地形變妳 淺,波浪產生碎。 裂的連線。 荐) 00000000 SPART 0.00000 低潮 Oooo.. (前家) 潮間帶:高~潮 ◎圖5-13 海岸地區示意圖 ( 沙岸為例) 4 Sm Chapter 5 地形系統 103