光の問題です。問3の解き方が見当もつかないので導きかたを教えてください。

3 図1は回転する鏡の反射を利用して光速を測定する概念図を示したものであ る。 光源Aからは単色の緑色光が出ており, 光は半透明鏡Hを抜けて, 平面鏡 Rにより反射される。 Rは軸Oを中心に回転できる構造となっており, R で反 射した光は凹面鏡Mに達する。 MはRの回転軸Oが曲率半径の中心となって いるため, M で反射した光は同一の経路を通って再びRに達する。 Rが静止し ている場合は反射された光は OA 上を戻り, 半透明鏡H上の点Qで反射し、ス クリーンS上の点Pに到達する。Hは光路 OA に対してπ/4 [rad] の角度で S は光路 OA に対して平行に設置されている。 いま, 平面鏡 R を角速度で回転 させる。このとき, 光が平面鏡 R と凹面鏡 M を往復する間に, R は微小角度0 だけ向きを変えることになる。 そのため, R で反射された光はOQ′′の経路を 通り, スクリーンS上の点Pに到達する。 OM 間の距離をL. 真空中の光速を とする。 実験は空気中で行われ、 空気の屈折率を1とし、以下の問に答えよ。 回転平面鏡 R 凹面鏡 M 図1 問光が OM間を往復する時間を求めよ。 -7- 0 スクリーンS PP 一方向 問20 , L,c を用いて表せ。 また, 角度∠QOQ を 8 とおいて, これ を0を用いて表せ。 @ て in tan 0 0 の近似式を用いること。 H 半透明鏡 図2 方向 3 光路 OQP の長さをDとおき, また, PP' 間の距離をdとしたとき, dを Dと8を用いて表せ。 光源 A 間 42はPP間の距離と角速度の関係を調べた空気中での実験結果で ある。 得られたグラフは比例関係を示しており、 この直線の傾きから光速 を見積もることができる。 問1~問3の結果を用いて, dのに対する比例 定数 を求めよ。 ここでは, 角度 0 [rad]は1と比べて十分に小さいとし ・空気 OM6 (306-81) 問5 実験の条件をL=20.0m=5.00 × 10 rad/s. D = 5.20mとしたと き PP間の距離d=7.00mm という結果が得られた。 この結果から, 光 速cを有効数字3桁で求めよ。

練習29教えてほしいです🙇

6 第2章 複素数と方程式 3乗するとαになる数をαの3乗根という。 すなわち, x = α と なる数xがαの3乗根である。 前ページ例17 より,1の3乗根は, -1+√3-1-√3i 練習 29 1, 2 9 2 である。 オメガ 1の3乗根のうち虚数であるものの1つをω とするとき,次のこと を示せ。 (1) 1の3乗根は 1 2 である。 (2) w²+w+1=0 工夫して因数分解することで, 高次方程式を解いてみよう。 例 4次方程式xx-2=0 を解く。 18 左辺を因数分解すると (x-2)(x2+1)=0 よって x2-2 = 0 またはx+1=0 ← (x²)²-x²-2=0

イラン・イラク戦争とイランイスラーム戦争とは何ですか？？ 新冷戦についても教えてほしいです

もしよければ解説をお願いします

U9 関係詞 演習問題 1. Can you see that tall lady ( ) is wearing glasses? [x] who whom whose what 2. The earthquake disasters of the last ten years ( ) many people homeless are causing despair in some areas. [ ] can leave when it left which have left 3. The old princess discovered a singer there whose voice she thought unusual and () she wanted her guests to hear. [*] whose when whom have left : 4. We saw a house () roof was red. [*] that which whose which what 5. Godzilla destroyed the house on ( ) roof was lying a beautiful lady. which whose of which what [] than we see 6. The town is now different from () it was ten years ago. [X] what as that which 7. The reality of life is less () in our future than what we remember from our past. [*] what we see that we see how we see 8. A large proportion of ( ) English-speaking people watch on TV is of American origin. [- that what where which 9. ( ) we read in those days has remained in my mind till today. [*] That What It Which

解説おねがいします！！

two times more twice as many 11. Neither Mary nor Tom can swim. [+] Tom can ( ) swim than Mary can. no more not more two more umes more than two times no less 12. Sunlight is no ( ) necessary to good health than fresh air. [+] less more much little 13. He saved as much as one million yen. [EE] He saved no ( ) than one million yen. more less better the more away the more farther away LAE... 14. This model is far ( ) to the previous one. [X] like superior good better 15. ( ), the worse I seem to feel. [X] Taking the more medicine The more medicine I took More medicine taken 18. I like George ( ) for his faults. all the better best 16. The more Bob rowed the boat, () he got. [X] the farther away 20. John looks ( happiest U9 関係詞 worse When I take more medicine the more far away 17. He is not ( ) a master as a servant in his own house. [X1LX] very much very little so much so many not less all the best 19. Osaka is the largest city but one in Japan Osaka is ( ) city in Japan second as large second the largest [**] the best [*] the second largest the next large ) when he is cooking. [] like the happiest man the happier the happiest

下のチェックの問題なのですが，ingとtoの使い分けが分かりません！😭 toが続く動詞，ingが続く動詞で覚えないと解けないんですかね？分かりやすく教えてください！！

メグは健康のためジョギングすることにした. ) every morning. 彼女は毎朝ジョギングを楽しんでいる. ④ She enjoys ( to 〜が続く動詞: decide, hope, wish, plan, refuse (拒否する) など 例 Satoshi hopes to become a scientist. ④~ing が続く動詞: enjoy, mind, finish, give up, stop, practice, avoid (避ける など 例 I haven't finished writing my report yet. ◇3 to 〜と〜ing で意味が異なる動詞 : remember, forget など 例 Remember to call her later. ( 〜することを覚えている、忘れずに〜する) I remember seeing him somewhere before. (~したことを覚えている) CHECK ① 日本語に合うように, ~ing 形を用いて英文を完成させてみよう. 〈→B.E.21> 1)( ) a soccer game is fun. (サッカーの試合を見るのは) ) ( ) next to you? (私が隣に座ってもよいか) (料理を手伝わなくて) 2) Would mind ( you 3) I'm sorry for ( ) ( ) you with cooking. ② ( ) から適切なほうを選んでみよう.〈→B.E.22〉 1) I wish (to study/studying) abroad in the future. 2) My father stopped (to read/reading) the newspaper and talked to me. 3) I'll never forget (to visit / visiting) Yakushima last summer.

英検準1級の英作文の添削お願いしますm(_ _)m

I agree This essay of food and crime. The first reason is that we are many cases, especially interested in food safety. if we don't improve food safety, food is likely get worse and worse because of some people will bring we will be able to get healthy. However, by improving; The second reason example, reducing crime is that I want to reduce crime in society. For t Soviet live in can for children. If it were provide a good opportunity to If it were not for reducing crime, we could not have such an opportunity lieve that society needs to improve food these In to that more needs to be done to improve public safety. will explain the two main reasons for my argument in terms and crime. on a disease. disease in safety

raise2英語総合問題を使っている方に質問です。 Lesson8(p34〜37)と別冊ノートp19の答えを見せていただけないでしょうか。

Lesson 8 受動態 >pkeeper [Jap ki:pir| impressed with... ...に感動する CAN-DO リスト Reading Grammar Expression Listening Speaking /12 /14 /47 /21 48 Reading 【速読 問題 次の英文を3分で読んで、1.の問いに答えなさい。sainte A few years ago,/a 43-year-old shopkeeper named Rajesh Kumar/visited the construction site of a railway station/in New Delhi.//He saw many children/who were playing at the site/instead of studying at school.//He thought/he had to do something/to help those poor children.//He decided to create a special 5 classroom for them.//He said,/"We didn't have much,/so I started teaching them under a bridge/ (2) with the things I could use."// In this way,/his special open-air classroom was born/under the bridge of the Delhi railway system.//A train passes above the classroom every few minutes,/ but the noises are not a problem for the children. //There are no chairs or desks/ and the children sit on the ground. //The walls are painted black/and used for blackboards.// 口 平易な英語で /6 Rajesh has tried hard/to teach the poor children under the bridge.//More and/ more people are impressed with his volunteer work.// (3) Through the kindness of people in the community,/the poor children are given (4) many things. //They are iven not only books and pens but clothes and shoes.//One kind person even ends a bag full of biscuits and fruit juice/for the students every day. //Children me to the classroom for many reasons.// (s) This is one of them. // Rajesh says, / "I hope/that future generations will learn something.//Then/we ll have a better world."// 『New Delhi [n(ja:deli] ニューデリー (インドの首都) U-3420 Total /100 'open-air 戸外 [野外] の (232 words) O 1. Rajesh Kumar の学校の様子を表すものを、 次の ① ~ ④ から選びなさい。 (5点) 232語 x60= 3. 下線部(2)の具体例を一つ, 日本語で説明しなさい。 (5点) 【精読 問題もう一度英文を読んで, 2.7.の問いに答えなさい。 2. 下線部 (1) の those poor children とは具体的にはどのような子どもたちですか。 日本語で 説明しなさい。 (6点) wpm 6.下線部(5), This と them の指すものを明らかにして, 和訳しなさい。 (7点) 文法 4. 下線部(3)の Through とほぼ同じ意味の through を含む文を,次の ① ~ ④ から選びなさい。 She has just got through high school when her father died. (4) 2 The rain lasted all through the night. 3 They drove through the tunnel under the mountain. 4 Tom succeeded through hard work. 5. 下線部(4) の many things について, 本文中に挙げられている6つのものを日本語で答えな さい。 (各2点) 7. Which of the following are true? (You may choose more than one option.) (8) 実践問題 Rajesh Kumar was a construction worker at the construction site of a railway station. 2 Many children were playing at the site after school. 3 Rajesh started teaching the poor children under the bridge. 4 The noises from the passing trains did not prevent the children from studying. 5 People in the community helped Rajesh and the children. 6 Without a bag full of biscuits and fruit juice, the children would not. have come to Rajesh's classroom.

教えてください

U9 関係詞 演習問題 1. Can you see that tall lady ( ) is wearing glasses? [x] who whom whose what 2. The earthquake disasters of the last ten years ( ) many people homeless are causing despair in some areas. [ ] can leave when it left which have left have left 4. We saw a house ( that 3. The old princess discovered a singer there whose voice she thought unusual and () she wanted her guests to hear. [1] whose when whom ... ) roof was red. [*] which whose 5. Godzilla destroyed the house on ( which whose which what ) roof was lying a beautiful lady. of which than we see what [X] 6. The town is now different from () it was ten years ago. [X] what as that which 7. The reality of life is less ( ) in our future than what we remember from our past. [**] what we see that we see how we see 8. A large proportion of ( ) English-speaking people watch on TV is of American origin. [ty- that what where which 9. ( ) we read in those days has remained in my mind till today. [*] That What It Which

至急です。教えてくださいお願いします🙏

U 10 演習問題 1. If I were a little younger, I ( have joined join 2. A: What should I do? B: If ( ) write a letter. [X] I had done it, you should you had done it, you should ) you in climbing the mountain. will join have lost 3. If the police () the girl earlier, they might have saved her life. had found has found will find have won would join [センター試験] 4. If our last batter had not finally hit a home run, our team would ( 5. "Was Jack at the party?" "I don't think so. If he had been, I ( had seen saw I were you, I would you were me, I would lose would find [X] win [センター試験] him." [センター試験] would have seen would see ) the game. 6. ( ) for the support of the public, the President could not have survived the revolt. [#] But If it were not Regardless Without 7. ( ) your financial help, we wouldn't be able to carry out our plan. Except Instead of Thanks to Without [センター試験] 8. () a little more patience, you would have succeeded. [***] If With And Because 9.( ) not been for your help, I should have failed. [PRE÷D***] Had there Had it Were it Has it 7/8