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物理 高中

問個 為什麼氣泡會往上浮啊?氣泡的蒸氣壓造成的力不是四面皆同嗎 那它為什麼會往上浮?

三、沸騰 定義:1.當液體在容器中被加熱,通常在容器底部加熱處形成氣泡(bubbles),當溫度 到達某一程度,蒸氣氣泡形成,經由底部上升至液面破裂,此時,我們說此液 體正在沸騰(boiling) 。 2. 液體沸騰的溫度決定於作用其上的壓力,如下圖所示。對於一個氣泡而言,為了 溫度處於能形成和長大,其內之壓力P,至少須等於P,而後才能上升接近液面,不過, 弗腾. 簡直是液體的蒸氣壓,所以我們得結論:當液體的溫度處於其蒸氣壓等於作用於 其液面的外壓時,此液體就可沸騰。壓力1atm(即101.3kPa)時,液體沸騰的 溫度,稱為正常沸點(normal boiling point),例如,水的正常沸點是100℃,而 苯的正常沸點則稍低,80℃。水的正常沸點100℃ 表示水在100℃時之蒸氣壓 為760 torr;酒精的正常沸點 78.4℃表示乙醇在78.4°C時之蒸氣壓為 760 torr; 二乙醚的正常沸點34.6℃表示二乙醚在34.6℃時之蒸氣壓為760 torr。 S P2 每單位面積上的大氣壓力 液面 液面 ·液體的氣泡 蒸氣分子撞 頸蒸 三 擊氣泡界面 意識器容空氣泡- 而向外推壓 a 蔬果 Pi 高炎 (a) ④當P大於P時,液體沸騰,氣泡由底部上升至液面,氣泡的壓力至少要等於 外壓,才能存在。 大氣壓力經液體向氣泡推壓 (b)

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英文 高中

請問有live abc 10月份的英文雜誌解答嗎?謝謝

Weekly Review Test Live Week 2 (Units 4-6) Class:bir hasardn piris co No.: Name: 第一部分:聽力測驗 一、看圖辨義 (Q1: 7%, Q2: 12%) ( ) 1. (A) veel b1 best on (B) (C) ( )( ) 2. NAME Laerdal WestConnex Yamate Tunnel Zhongnanshan Tunnel Jinpingshan Tunnel St. Gotthard (SI) prane ar (D) SEIT (8) LOCATION Norway Australia Japan China China 2015-he Switzerland LENGTH YEAR 2000 2023 2015 2007 24.5 KM 22 KM 18.2 KM 18 KM 17.5 KM 17 KM 二、對答(27%) ( ) 3. (A) Good! You will make more money. (B) You should. You're working hard. ( ) 7. (A) They have lots of soda. 2011 (C) Wow! You must really enjoy working. (D) Cool! I want to work in a new office 三、簡短對話(27%) ) 6. (A) She needs to get a new phone. M 1980 too. ( ) 4. (A) Sure. We can grab a few beers. (B) Which movie do you have in mind? (C) No. I hate doing exercise. (D) OK. We can study together. ( ) 5. (A) Yes. The killer was caught right away. (B) No. No one survived the accident. (C) Really? What's so funny about it? (D) Right. The police don't have any clues. (B) She wants a job at a convenience store. (C) She doesn't have money to pay her bill. (D) She can trust the man to do things. (B) They need 300 more cans of soda. (C) She forgot to buy soda. (D) Not everyone at the party will get a can of soda. 2023 年 10 月號 10/09-10/13 Advanced Level () 8. (A) He looked sick today. (B) He talked too much today. (C) He didn't act like himself today. (D) He was nice to the woman today. 四、長篇聽解(27%) Facts about Sir William Wallace ➤ He was a heroic figure in Scotland in the century. ➤ He led the Scottish resistance against English ➤ His determination and Live A2-1 inspired his people to fight. ➤ He was by the English. ( ) 9. (A) Life in Scotland during the 13th century. (B) The Wars of Scottish Independence. (C) A Scottish hero. (D) The Battle of Stirling Bridge. ( ) 10. (A) Inspiring. (B) Determined. (D) Creative. (C) Brave. ( ) 11. (A) He was sick and died after one of his battles. (B) He was captured by fellow Scots. (C) He was made into a hero in England. (D) He was killed by the English. 第二部分:閱讀理解能力測驗 一、詞彙(28%) ( ) 1. Without his parents' full support, Tim's business has been forced to be down. (A) relied (C) punched (B) scaled (D) assumed () 2. Unable to find a steady job, Jay can only work part time and is thus financially (A) normal (C) magical ( )3. The newly-built (B) capable (D) unstable serves as a parking garage that can provide enough space for hundreds of cars. and killed (A) structure (C) tunnel ( ) 4. The employee properly (A) stealing (B) crowning (C) performing (D) threatening the players believe that they can win any game together. (A) lung (C) detail (B) mystery (D) flock ( ) 5. With a strong team was punished for not the task he was given. () 6. Luckily, the accident was fully bab(A) sliced (C) stuffed (B) spirit (D) plenty on my car camera, and the video proved that I was not responsible for it. (B) paused (D) captured

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