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物理 高校生

2mva+0=(2m+m)vABの0は何を意味しているのですか。

'Q A 発展例題 14 重ねた物体との衝突 図のように, 水平でなめらかな床の上に,質量 2mの物体Aが置かれ,その上に質量mの物体Bが 置かれている。 Aと床の間には摩擦がなく, AとB の間には摩擦があるとする。 物体Aの左側から,質 量mの物体Cを速さで衝突させると,衝突は瞬間的におこり, 最初, 物体Bは動かな かったが,やがてBはAの上にのったまま, Aと同じ速度で運動するようになった。 A とCの間の反発係数をeとし,右向きを正とする。 衝突直後のAとCの速度をそれぞれ 求めよ。 また, 一体となったときのAとBの速度を求めよ。 指針 衝突は瞬間的におこるので,衝突直 後では, AとBの間でおよぼしあう摩擦力による 力積は0とみなせ, Bの速度は0である。したが って,衝突前と衝突直後で、AとCの運動量の和 は保存される。 その後, Bは動き出すが, 衝突直 後とそのときのA,Bの運動量の和は保存される。 解説 衝突直後のCの速度をvc, Aの速度 を va とする (図)。このとき, AがBから受ける PROSIONELE C Vc B A VAN 止し Cm 発展問題 195, 196 ■突園 の Bm per A Vo 力積は0とみなせる。 したがって, 運動量保存の 法則から,右向きが正なので, mv=mvc+2mvA & 978 反発係数の式は, e=- 1te 3 平水 (2m- J&LO VAVC 平1te NU VO 1-2e Vo 2式から VA 3 -Vo Vc=₁ 3 THE JS 0 9 5 4 1 0 TUUL また,一体となったときのAとBの速度をVAB と する。衝突直後とそのときとで、AとBの運動量 の和は保存されるので、 2mv+0=(2m+m)VAB 2m 0+0=3mUAB VAB= 2(1+e) 9 Vo

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英語 高校生

英語の時制の問題なのですが、全体的に答えがわかりません。考え方でもいいので教えていただけませんか?

1. I think something wrong (happen) [4語] 「何か良くないことが起こるだろうと見 2. He (live) in Tokyo. 3. We (fly) to Vancouver on our school trip next summer. [₂] 4. It (rain ) in Osaka tomorrow. [2語] 「明日、大阪は雨です」 5. I'll call you as soon as I (arrive) at Kyoto station. 6. He (leave ) Japan next week. [進行形を使って] 7. I (read) around midnight last night. 8. I (be) a university student. 9. She (not know ) my e-mail address. 10. Please call me later. We (have) lunch. 11. Water (boil) at 100°C at sea level. 12. World War II (break) out in 1939. 13. He (teach) Japanese in this school ten years ago. 14. (I see) Ted tonight. [進行形を使って ] 15. (Ivisit) my uncle in Canada this summer. 4語 「叔父さんを訪ねる予定 (計画済み) 16. Ken (go) to school at eight. 17. The phone rang while I (cook). 18. The sun (rise) in the east. 19. Please wait here until dinner (be) ready. 20. My father (work) for a trading company. 21. Haste (make) waste. 「急がば回れ」 22. What (you do ) tonight? [5] 「今夜は何をする予定ですか?」 23. I must finish my homework before my mother (come ) home. 24. I (see) you next week. [2] 「来週君と会うよ」 25. My grandfather (be) seventy next year. 26. (I meet) Jim this evening. [*] 27. He usually (walk) slowly, but he (walk) very fast now. 28. Practice (make) perfect. (習うより慣れろ ) 29. We (fly) over Osaka around ten tonight. 10時ごろ大阪の上空を飛んでいるでし 30. If 「明日、雪がたくさん降るようなら、 電車には乗らない (take a train) 」

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英語 高校生

2の5番の並び替えわかる人いますか🌙*.。★*゚ 教えてください🙇‍♀️

2 alds 3 Exercises 1 日本語に合うように、英文を完成させなさい。 A 1. 私が謝るまで、 彼女はずっと私に腹を立てていた。 She angry with me until I apologized to her. 2. 彼女が私に電話をくれた時、私はちょうど帰宅したところだった。lqo ode When she called me, I home. O OY 3. 校長先生とは,学校のパーティーでお話しするまで一度もお会いしたことがありませんでした。 I the principal until I spoke with him at the school party. van is neggad (blueo) mas Jasbios ¤À À 4. 彼女は15歳になるまで, ずっとカナダに住んでいた。 SPEAR wond 3 USPR She in Canada until she turned fifteen. ( 内の語句を並べかえて, 英文を完成させなさい。 A B ob of slds od 1. Before I introduced him to Lisa, (her/already/with/talked/he/had). 私は彼をリサに紹介して 2. Mao (one hour/sleeping/ had/for/been) when her mother came in her room. 3. Takashi(until/done/never/volunteer work/ had) he entered high school. 4. Shohei(driving/three hours/had/for/been) when his smartphone rang. 5. (it/before/stopped/had/raining) you arrived at the station?au d'amo no? S Sand A ( 内から適切なものを選びなさい。 BCD ten min 1. You (receive / will have received/ have received) the letter by tomorrow.yo 2. I remembered I (see/have seen/had seen) the woman in the train a week befo the woman de a 3. I (looked / have been looking/had been looking) for you for one hour when VAM SH appeared. 4. I (have read/had read/will have read) the book five times if I read it one more 5. We talked about the movie which we (see / have seen/ had seen) before. JUAN 4 日本語に合うように,( に適切な語を入れなさい 。 総合 1. 母が帰宅するまでに,私は宿題を終えてしまっているだろう。

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英語 中学生

英検の過去問なんですが、答えが見つからない ので答えを教えてほしいです

(2) (1) A: Mom, I met a ( B: That's great. 1 famous (5) (6) 1 (18) Grade 4 (8) 2 次の (1) から (15) まで ( に入れるのに最も適切なものを 1,2,3,4の中から一つ選び、その番号のマーク欄をぬりつぶしなさい。 (3) A: When did the Sylvia Hotel open? B: In 1913. It's over a hundred years ( 1 many 2 quiet (4) A: Everyone is here, so we can ( B: OK. 1 visit Mary ( 1 misses day. (7) A: Your ( Ted made some friends at his new school, so he was ( thin 1 2 slow 3 glad Peter became a ( 1 member B: Thank you. 1 question Grade 4 2 next ) soccer player on the train today. 2 start 3 hard 2 bench ) to get a bird for her birthday. 2 picks 3 hopes 1 That's my dream. 3 I'll watch you. 1 Have fun. 3 Not yet. 3 tall 1 Did you make them? 3 Is it finished? Daughter: I will. 1 I'm hungry. 3 stay at home. 3 carry ) of the swimming club. ) is so beautiful! I love seeing the flowers in spring. 2 holiday 3 sound 2 ) the movie now. 3 salad 3 moved (17) Father: How was your band practice today? Son: ( ) We learned a new song. 1 I have a ticket. 3 You're right. I ( ) a bad cold today, so I couldn't have lunch with my grandmother. I was really sad. 1 kept 2 had Mother: Would you like a cupcake? Daughter: Yes, please. ( ) Mother: No, they were on sale at the supermarket. 4 thick (19) Girl: Thanks for studying with me today. Boy: ( ) I enjoyed it. 次の (16) から (20) までの会話について ( に入れるのに最も 適切なものを 1,2,3,4の中から一つ選び、その番号のマーク欄をぬりつ ぶしなさい。 (16) Girl: I love playing the piano. Boy: Do you want to be a professional pianist in the future? Girl: Yes. ( ) 4 old lazy 4 drop 2 After math. 4 No problem. (20) Daughter: Dad, shall I cut the vegetables for the salad? Father: Yes, please, but ( 4 follows He swims every 2 It's my guitar. 4 You can have one. 2 it's a fruit. 4 be careful. 4 towel 4 garden 2 It was fun. 4 It was on the radio. 4 rode 2 Will they be ready? 4 Are you late? (9) (12) Grade 4 (13) A: What can you cook? B: I like to make food from different countries. ( Italian food and Chinese food. 1 For 2 To (10) A: Did you meet the new English teacher? B: Yes, he comes ( 1 until 2 (11) A: What ( (14) 3 ) of dog do you want? B: I want a big dog because I love to go on long walks. 1 room 2 wind 3 kind (22) (15) A: Excuse me. ( B: That one is $10. 1 Where (23) After school, Chris enjoys ( listen to her funny stories. 1 talking 2 opening (24) 4級 354. 34 $18,73 Today, it will snow much ( and I will make a big snowman. 1 harder 2 hard (25) (21) 新しいくつを買ってはどうですか。 1 arplad I love riding my bike to the park, but my sister ( likes to stay at home. 1 haven't 2 doesn't Brush breakfast. 1 ) South Africa. He loves rugby. along 3 This is 10 みが 朝食を食べたら歯を磨きなさい。 (after 2 your 3 you 2番目 1 2 Why (4) 2 ( you buy 3 why 4 new shoes 2番目 4番目 1 2 5 My brother tomorrow. ) much is this T-shirt? 3 2 3 As スープをもっともらえますか。 have ( soup can 2 2 Grade 4 LI 856 次の (21) から (25) までの日本文の意味を表すように ①から⑤までを並べ の中に入れなさい。 そして、2番目と4番目にくるものの かえて 最も適切な組合せを1,2,3,4の中から一つ選び、その番号のマークを ぬりつぶしなさい。 ※ただし, ( の中では、夏のはじめにくる語も 小文字になっています。 2番目 2 over W 4 from 2番目 3 holding BEL はじ これは私の初めてのシンガポール旅行です。 (Singapore 2 my first 4 to ) with his teacher. 3 don't 2② 3 hardest 3 When ) than yesterday. 3 4 eat 5 teeth) 3 4 In 4 3 4 side ) example, (3) some more 3 (5 3 4 asking 5 trip) 5 don't) He likes to 4 isn't (4) (write 2 to 3 by 4 has 5 a report) 2番目 2 4番目 わたし あに あす 私の兄は明日までに, レポートを書かなければいけません。 4 too hard ). 4 How (51) My brother She 4 4番目 ⑤5⑤ - (3) (3) please? 4 3-0

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英語 高校生

3枚目の問いの答えを教えてください。 よろしくお願い致します。

Radio Host: durlar aind Roger Ali: Radio Host: Roger Ali: Radio Host: Roger Ali: Radio Host: Roger Ali: Roger Ali: Radio Host: Roger Ali: Radio Host: Welcome back. As I mentioned before the break, Roger Ali is with us today to talk about artificial intelligence. Thank you for being here, Dr. Ali. Thank you for having me. I'll be honest with you. When I hear the words "artificial intelligence," the first thing I think of is the character HAL from the movie 2001: A Space Odyssey. ch tud goons bad Radio Host:ome In other words, the search engine draws conclusions about what we're looking for on the Internet. Roger Ali: Sure. Many people remember HAL. In the movie, he's the computer that controls the systems of a spacecraft. He also speaks with the people on the spacecraft. And he's not very happy when the people decide to turn off the computer. In the movie, HAL becomes very dangerous. That's right, but fortunately, artificial intelligence in the real world isn't like HAL. Well, that's good! Can you tell us what is happening in the field of AI? Many interesting things. For example, when we search for something on the Internet, the search results that we see are chosen carefully. The search engine has learned which websites are the most popular, the most reliable, and so on. This prevents us from seeing a lot of websites we're not really interested in. Tosa Right, so it only shows us the information it thinks we want to see, which includes go advertisements as well. We usually see only ads for products that the computer thinks we might want to buy. You said, "It thinks," but is the search engine really thinking? IST That depends on your definition of thinking. The search engine is capable of learning machine learning-and it does have knowledge. Knowledge about the Internet. Are learning and knowledge part of your definition of thinking? They're part of it, but human beings are capable of so much more. We have our senses hearing, smell, sight, touch, taste-and our emotions. We notice a lot about the world, and we use our judgment to make decisions. That's true, and most computer scientists know that we can't replace human beings with computers. We don't intend to make robots for every kind of job, either. That's just not practical.

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