問2の(3)(4)を教えてください

問2. ばね定数 k [N /m] (k > 0) の軽いばねがある。なめらかな水平面上でこ 自然長 のばねの左端を固定し、右端に質量 m kg] の物体を取り付けた。次に、 手で mm 物体を引っ張ってばねを自然長より cm 伸ばしてから静かに手を放した。図 0 に定義された座標軸に基づいて、その後の物体の運動について、以下の間に答 えよ。ただし,時刻 ts]での物体の位置を (t) [m] とし、ばねが自然長のときの物体の位置を原点とする。 (1) Find the restoring force F, [N] that the spring tries to return when the object is displaced by z m from its natural length. (2 points) d'z as its acceleration. dt? (2 points) (2) Find the equation of motion of the object, using the notation of (3) Find the general solution of the equation of motion of the object. (3 points) (4) Find the solution that meets the initial conditions described in the problem. Here, the moment when the hand is released is set as time t==0s. (3 points) 問3.問2では摩擦などの抵抗力がない理想的な単振動を扱ったが、実際には抵抗力が存在する。 抵抗力は速度 dt に比例することが多く、この比例定数をc[N.s/m] (c> 0) とおくと、 運動方程式は教科書 P.66 の(2.40)式として表 される。この方程式の一般解は、 教科書 P.52に示す「定数係数の2階線形同次微分方程式の一般解」として表され、 教科書 P.66 の下段3行に示すような解 a) c)となる。これらの解の導出課程を、 以下の手順に従って示せ。 d。 da. (1)(2.40)式 m = ーkc - c dt? の右辺において、c dt の項の符号がマイナスである理由を考察せよ。 dt (2点)

問2の(3)(4)を教えてください

問2. ばね定数 k [N /m] (k > 0) の軽いばねがある。なめらかな水平面上でこ 自然長 のばねの左端を固定し、右端に質量 m kg] の物体を取り付けた。次に、 手で mm 物体を引っ張ってばねを自然長より cm 伸ばしてから静かに手を放した。図 0 に定義された座標軸に基づいて、その後の物体の運動について、以下の間に答 えよ。ただし,時刻 ts]での物体の位置を (t) [m] とし、ばねが自然長のときの物体の位置を原点とする。 (1) Find the restoring force F, [N] that the spring tries to return when the object is displaced by z m from its natural length. (2 points) d'z as its acceleration. dt? (2 points) (2) Find the equation of motion of the object, using the notation of (3) Find the general solution of the equation of motion of the object. (3 points) (4) Find the solution that meets the initial conditions described in the problem. Here, the moment when the hand is released is set as time t==0s. (3 points) 問3.問2では摩擦などの抵抗力がない理想的な単振動を扱ったが、実際には抵抗力が存在する。 抵抗力は速度 dt に比例することが多く、この比例定数をc[N.s/m] (c> 0) とおくと、 運動方程式は教科書 P.66 の(2.40)式として表 される。この方程式の一般解は、 教科書 P.52に示す「定数係数の2階線形同次微分方程式の一般解」として表され、 教科書 P.66 の下段3行に示すような解 a) c)となる。これらの解の導出課程を、 以下の手順に従って示せ。 d。 da. (1)(2.40)式 m = ーkc - c dt? の右辺において、c dt の項の符号がマイナスである理由を考察せよ。 dt (2点)

さっぱりわかりません！答え教えてください！

10 11. Mr. Hamada plans - the réfrigerátor by the end of the month. (A) to replace (B) replace (C) replacing (D) replacement し 12. Some people suggest public transportation to the conference center. (A) used (B) using (C) will use (D) to use 13. Residents agreed an extra 20 dollars for next year's renovation. (A) paying (B) payment (C) paid (D) to pay 14. The nearest pharmacy at the corner of Johnson Street and Queen Avenue. (A) locates (B) is locating (C) is located (D) to locate 15. Cars by our experienced engineers. =ー=ーー (A) to repair (B) are repaired (C) repairing (D) repair eu biovA (A)

TOEIC正解、よろしくお願い致します！

Questions 5-7 refer to the following letter. a new member to the club To welcome confirm To | continued membership Mr. Leonardo Harper 571-45 Heiligenstàdter Street Vienna 1190 の) December 15 Dear Mr. Harper, Thank you for your continued support of the North Vienna Concert Hall We are writing to confirm receipt on December 14 of your North Vienna Club membership renewal payment for next year. Alnterviews with musicians To celebrate our 30 year anniversary, we are happy to announce some new special benefits for club members. Starting next year, club members can receive a 10% discount on any concert held during the first three months of the year. Call our ticket office at 1-5123098 and use the promotional code CZ1713 when you order your tickets. Please note that discounts only apply to pre-orders placed during this special period. IC) Commentaries on 0 The concert schedule performances As always, members will receive our monthly magazine, North Vienna Club, which features concert reviews and interviews with various artists and musicians, together with news and schedules of all of the events at the concert hall. Next month's issue will feature a six-page interview with the world famous conductor Franz Minsky. Once again, we thank you for being a North Vienna Club member and for supporting arts and music in our community. Sincerely, Roy Pophins Roy Hopkins Director North Vienna Concert Hall の の)

分かる方教えて頂きたいです。

2 CONVERSATION A Read the sentences and agree or disagree. Use expressions from the box and give your reasonS. Yeah, you're right. Really? I don't think so. Sorry, but l disagree. I think so, too. Example: Your friend: I think history is a boring subject. You: Really?l don't think so.l like to read about heroes. 1. Your friend: I think English is a difficult language. You: 2. Your friend: Bill Gates is a great hero. You: 3. Your friend: I think our city is a really boring place. You: 4. Your friend: Everything is very expensive in our country. You: Our teacher gives us too much homework! 5. Your friend: You: Number the sentences in order to make a conversation. B Nelson Mandela. I'm writing a paper about a hero. Really? Why is he your choice? Well, he was a great leader who united his country. That's interesting! Who are you writing about?

TOEFLの誤りをひとつ選択する問題です。37の答えはCなのですが、正しく直すとどうなるかがわかりません…どなたか教えてください🙏

35. Electric lamps came into widespread use during the eariy 1000 replaced once-popular type of fat, gas, or oil lamps for almost every purpose. A B C D 36. Located in Canada, the Columbia Icefield covers area of 120 square miles and is B A 3,300 feet thick in some places. TviO 2oie abaoob C D 37. Composer Richard Rodgers and lyricist Oscar Hammerstein II brought to the musical allivieM oecmnoH A Oklahoma! extensive musical and theatrical backgrounds as well as familiar with the C d B traditional forms of operetta and musical comedy. D aha 38. Although traditional fiutes are among the world's oldest musical instruments, but the 0 09nel B tong To yodmt odt of bosh A flute used in orchestras today is one of the most technically sophisticated. C D 10oeo to auoilim abnid boeoleyo is te ybd ondes 39. Rice, which it still forms the staple diet of much of the world"'s population, grows B A nd aue best in hot, wet lands.

問題814、接続詞の問題です。解答は④のWhenなのですが、③のSinceが不正解である理由が分かりません。「春がきたので、多くの教授が戸外で授業を行う。」という和訳ではおかしいでしょうか。

) spring comes, many professors move their classes の which 2814.( outdoors. の Although ② However 19V9woH S)n9v3) 3 Since ④ When がタメな理的は、hod 愛応 10mn him put yourself in his place. M9I0n1oL_200gOn

67の答えがCなのですがおかしくないですか？恐らくCEOの事を書いているのだと思いますがCEOと社長presidentは別の役職で同じではないと思ったのですが

65-67 refer to the following conversation. W: Richard, we were deeply impressed with your presentation this morning. You concentrated on the benefits the customers 65. What did the man do this morning? OEIC (A) He had a talk with an executivetsTENING will get from our new products. That was awesome. The sales manager wants you to give a presentation on the same topic to the board of directors next week. (B) He gave a talk. (C) He made a presentation to the board of directors. (D) He put together handouts. 66. What does the woman suggest? I'm glad you liked it. I'l try my best to please the board of directors. Maybe l could use some technology to supplement my presentation. Don't you think using a video allows the audience to understandit (A) Preparing more informative materials (B) Using a video (C) Getting advice from the sales manager (D) Choosing a new topic M: ,Com, /。 better? W: That's a good idea. You should prepare more extensive handouts as well. I will be free this afternoon, so l can help you put them together. M: I'd appreciate it. Let's make it our top priority to ensure that our executives are satisfied. Even the CEO will be there. 67. What does the man say about next week's presentation? (A) It will take place in the afternoon. (B) It will concentrate on the benefits of video presentations. (C) The president will see it. (D) The sales manager will help them prepare for it. 65B 66A 6

このオレンジの線を弾いているところを和訳してください。

答えなさい。 ericans are always on the go. You are constantly moving about. You nev 。 stay in one place." 66 to visit them. 1. same family to continue to occupy a house for generations. Occasionally one generation lives 2. more money, the family (2) rents or buvs a more comfortable home than the one mey housekeeping in. They may move in order to live in a climate that will be better for the heaui or one member of the family. 3- Notes You Americans 「あなたがたアメリカ人」同格関係を表す言い方。 on the go 「たえず活動して」 move about |動 I き回る」/4rare 「まれな」/5 for generations 「数世代にわたって; 何代も」 occasionally 「時折」/6 make money 「収入を得る」/7 start housekeeping in 「所帯を持ち始める」 or oy se0olb tor nsderlhon o 問 1. ( 1 )に入る適当な1語を選び、その記号を書きなさい。 (1) that (2) who (3) what 問2. 下線部 (A) と(B) の英文を日本文に訳しなさい。 enu o pm d

大学1年生です。 英語の穴埋め教えてください🥺

13:53マ 全 a docs.google.com 70)Iused to cry, ( ) anyone or 1ポイント anything, missing my home. * a) didn't know b) knew not c) not knowing d) to not know 71) This machine is believed ( ) 1ポイント invented by him. * a) to be b) to have been c) to have had d) to be having 72)I took a wrong turn and got ( 1ポイント -) in the park. a) lost b) lose c) losing ○ d) have lost