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物理 高校生

物理のレンズの問題です。解説を読んでも全体的によくわからないので噛み砕いて教えて欲しいです。

例題 61 レンズ ② われわれの周囲には, めがねをか けた人が多い。 いまわれわれの目は 図に示したように,薄いレンズAと その軸(光軸)上の光によく感ずる 点Bをふくむ網膜とからなり,像が 網膜上につくられるとき物体を見る ことができると考えよう。 正常な目 ではレンズAの無調節状態 (疲労の 最も少い状態)で遠方が明りょうに見え、近くを見るには筋肉MがA の焦点距離fを変化させる。 正常な目ではf^>L(AB間の距離)となる ことはない。めがねを用いずに明りょうに見える最も遠い点, 最も近 い点をそれぞれ遠点,近点と呼ぶ。 以下, 目の位置とはAの位置を指し, A以外の光の進路中の物質の 屈折率は空気のそれと同じとする。 用いるめがねはいずれも薄い1枚 のレンズとしAの前方2.0cmにその軸をAの軸と一致させてかけるも のとする。レンズの種類については凸レンズ, 凹レンズのどちらかを 記せ。 (1) めがねを用いずに遠方が明りょうに見え、かつ近点が目から8.0cm この人の目ではレンズAの焦点距離fAはどれだけ変化するか。fの最 大値と最小値を求めよ。 ただしL=2.0cm とする。 (2) JAの調節範囲は (1) と同じであるが, L=1.8cmである人がAの無調 節状態で遠方を明りょうに見るにはどのようなめがねが必要か。 レ ンズの種類と焦点距離を求めよ。 (3) 遠点が目から150cmの近視眼の人 (L=2.0cm とする)が、遠方を 明りょうに見るのに必要なめがねのレンズの種類と焦点距離を求 めよ。 (4) 近点が目から38cmの遠視眼の人 (L=2.0cm とする)が,目から 20cmより遠い位置の物体を明りょうに見るのに必要なめがねのレン [北海道大・改〕 ズの種類と焦点距離を求めよ。 の位置 めの 2.0cm M A 目 の位 位置 B

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英語 高校生

この①と③と4番の私の訳し方って間違ってるんですか??教えてください🙇🏻

教科書 p.65 Section 3 位置注意 DRILL [ ]内の動詞を現在完了形にして、( )に入れて言ってみよう。 また意味を考えよう。 ●I Chave) already done my homework. [do] 意味: ② (Have 意味: あなたは夕食を食べましたか。 私はすでに宿題をしました。やってしまいました you Leaten ) your dinner? ③ Her brother Chas 3 [eat] Yes, I have. No, I haven't. ) Q gane ) to Ireland. [go] 意味: 彼女の兄はアイルランドに行ったことがあります。行ってしまいました 問題 ( )内の語句を並べかえて、英文を完成させよう。 また、意味を考えよう。 1. (the train / left / already / has). 答え: The train has already left. 意味 の電車はすでに出発しました。 2. (Ken/ has / his homework / finished)? 答え: Has Ken finished his homework? 意味:ケンは宿題を終わらせましたか。 3. (Linda/not/ her room/cleaned/ has). 答え: Linda has not cleaned her room. 意味: リンダは彼女の部屋を掃除していません。 dishes. 4. Yuka(washed/ has / already / the dishes). 答え: Yuka has already washed the 意味: ユカはすでにお皿を洗いました。譲ってしまいました 洗 5. (have/&ve/lunch/not/eaten) yet. 答え: We have not eaten lunch yet. 意味: 私たちはまだ昼食を食べていません。 HW

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英語 高校生

34〜41の答えを教えてください。

A long email from Japan arrived in the computer of Bill Perkins, who worked in an office in London. The message was from a company in Tokyo that Bill's company had just sent a large order to. Bill read it once and then once (注1) named Steve to read. Steve read it and also looked again, looked puzzled, and then gave it to a colleague" confused. The letter began by praising the English company. () It then mentioned that some goods had been damaged during shipping (2) to Japan, and then the letter happily 34 (v) This kind of letter may work well in Japan, 35 it is not very successful as international communication. The letter 36 the reader to read between the lines to understand the problem and to sympathize with the company. (5) Of course, it also wanted Bill and Steve's company to rectify the trouble. But the letter did not spell out (4) that message very 37 . So Bill and Steve were thinking of just ignoring it. But then they received more correspondence from the Japanese company, this time with a specific request for action. It was an hour later when a second letter arrived that contained 38 for the first confusing letter. It also stated the intent of the Japanese company concerning the damaged goods. They wanted the replacement items shipped as soon (25) would foot as possible with no charges. Bill and Steve were happy once again because their insurance company the bill 16), and the goods would arrive in about ten days. (2) The Japanese company didn't follow the standard international business pattern in its communication. But the English company was 39 , too, because they hadn't realized that there was a deeper meaning to the letter. Bill and Steve had only looked at the communication's surface. It seems to me that both sides could benefit from a seminar on international understanding. (1) colleague: (2) shipping: (**) * (注3) rectify: 対応する (注4) spell out : 詳しく述べる (5) insurance company (注6) foot the bill: 費用を払う t (Terry O'Brien et al. Simply Reading, Simply Writing NAN'UN-DO) 6

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英語 高校生

コミニケーション英語2 Lesson7 Section1 下のQuestion Anser Practiceの解説が知りたいです!

Communication English II Lesson 7 Encouraging Song Section 1&2 Reading Passage Section 1 There are many songs that help people overcome sadness or troubles. Makenaide may be one of them. This song has been encouraging many people for a long time. The lyrics of Makenaide were written by Sakai Izumi, the vocalist of ZARD. It became a hit in 1993. The following year, it was adopted as the theme song for the National High School Baseball Invitational Tournament. Some schools have also been using this song for graduation ceremonies. When the Great Hanshin-Awaji Earthquake occurred in 1995, this song was often aired. Many people were able to recover their spirits by listening to it. The song also cheered people up after the Great East Japan Earthquake in 2011. Unfortunately, Sakai passed away in 2007. However, this song is still popular today. Section 2 What makes this song so attractive? The answer may be in its lyrics. The song has a message of hope for everyone. Let's take a look at the first refrain. Sakai left a piece of paper on which she wrote the lyrics. It shows that she changed a part of them. She replaced the words "Don't stop until the end" with "Keep on running until the end". She may have thought that this sounded more positive. Handout Reading No.15 Text p.94-97 She changed this part while she was actually recording the song. "Which words communicate better?" was the question she always had in her mind. She always searched for words that would encourage people. Don't give up! Just a little farther 負けないで もうすこし Keep on running until the end 最後まで走りぬけて Even though we may be apart どんなに離れてても I'll stand by you with all my heart 心はそばにいるわ Follow the dream you'll catch in the end 追いかけてはるかな夢を 1. Question-Answering Practice Section 1 1. Who wrote the lyrics of Makenaide? The lyrics of Makeneide were written 2. What have some schools been using Makenaide for Sakai Izumi 3. Is Makenaide still popular today? song is still popular today. Section 2 1. What did Sakai leave? 2. Which words did she choose, "Don't stop" or "Keep on running"? She 3. What question did she always have in her mind?

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