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理科 中学生

理科です。この問題の(3)が分かりません。動滑車なら重さは半分、引く距離は2倍になるので(16cm,5N)を通ると思うのですが、なぜ(4cm,5N)を通るのでしょうか?教えてください🙇🏻‍♀️

T Ag20 A4 2002 5,58 0.42 0.28分のマー のはたらきについて調べるため、次の実験1]から[実験3)までも ただし、ばねばかり、滑車及び糸の質量は無視できるものとし、滑車に摩擦力ははたらかないものとす 自分 4 35 ① 図1のように、スタンドに定規を固定しばねばかりにつ いたおもりを取り付けた。 にたるみがなく、ばねばかりの示す力の大きさがONとなる 置からゆっくりと一定の速さでばねばかりを 240cm上に引 このときばねばかりを引いた距離とばねばかりの示す方 図2は、 [1] ②の結果について。 にばねばかりを引いた距離 (cm) を、 にばねばかりの示す力の大きさ 〔N〕 をとり、その関係をグラフに表したもので 図2 力の大きさ スタンド, 定規 定滑車 5のような装置をつくった。 15.0g 10.0 さ 5.0 [N] 4.0 愛知県 B'22年 理科 [実験2] スタンド、定風、動滑車、 定滑車、 ばねばかりと (1) で用いたおもりを用いて、図3のような装置をつくった。 にたるみがなく、ばねばかりの示す力の大きさがONとなる 置から、ゆっくりと一定の速さでばねばかりを 240cm水平に引い た。 このとき、ばねばかりを引いた距離とばねばかりの示す力の大 ばねばかり おもり 12.0 8.0 16.0 ばねばかりを引いた距離[cm] 20.0 スタンド 24.0 ばねばかり 実験3) に 図4のように、2つの動滑車を棒で固定し、棒にフックを取り付けた。 なお、棒とフックの質量は 視できるものとする。 ばねばかり、図4の動滑車。実験1で届いたおもりを用いて、 にたるみがなく、ばねばかりの示す力の大きさがONとなる位置から、ゆっくりと一定の速さ ねばかりを240cm水平に引いた。このとき、ばねばかりを引いた距離と床からのおもりのあと 25限 動くものとする。

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英語 高校生

4の解き方がわかりません。 例えば(a)で、続く文であくびを謝っていることも全て把握した上で、挨拶なのでpolitelyかと考えたのですが、なぜ誤りなのか教えていただきたいです。

13 Lucy is a British schoolgirl who lives in Oxford. She is talking to her father, Fred, in the kitchen of their home. Read the conversation below and answer the following questions. Lucy: (a) Good morning, Dad. Oh, sorry for yawning. What are you doing with that microwave oven? It looks heavy. Do you need a hand with moving it? Fred: I think I'll be OK, Lucy. I'm just going to put it in the car and take it to the city dump. Lucy: Couldn't you send it away to be repaired? Fred: It's ten years old and well out of warranty now, so I very much doubt that the manufacturer would do it. They probably don't even carry the spare parts anymore. Lucy: That's a shame. Oh, I know what! Why not take it to the Repair Café near my school? Fred: What's that? I've never heard of it. Lucy: It's brilliant! We visited it as part of our environmental science course recently. It's a meeting place where people can get together to mend broken items cooperatively. And have a chat and a cup of coffee! Fred: I'm all ears. Tell me more. Lucy: Well, the first Repair Café was started by a Dutch woman called Martine Postma in Amsterdam in 2009. (1) 彼女は,使い捨て文化で環境が破壊されて, ゴミの量が地球規模で増えることを心配してたん . She wanted to find a local solution to this global problem. Fred: That's what they call "thinking globally, acting locally," isn't it? Lucy: Exactly. She also wanted to address the decline in community spirit amongst urban dwellers and do something about people's loss of practical skills and ingenuity. Fred: And the idea (2) caught on? Lucy: Very much so. The concept has grown into a global movement. The one in Oxford started about four years ago. Fred: Impressive! What kind of things do they repair? Lucy: Oh, all sorts. Electrical appliances, clothes, furniture, crockery, bicycles, and even toys. Fred: How successful are they at repairing things? Lucy: Well, of course, they cannot guarantee to fix every item brought to them, but they have a fairly good success rate. One study found that on average 60 to 70 percent of items were repaired. The rate is higher for some items such as bicycles and clothes but lower for things like laptop computers. Fred: I can understand that. Just between you and me, I think some electronics manufacturers deliberately make products in such a way that you cannot disassemble them and repair them unless you have specialized tools and equipment. Lucy: Yes, and that's where Repair Cafés can help. But these cafés are not just about repairing things for people. They are places where we can meet others, share ideas, and be inspired. The volunteer repairers are very keen to involve the visitors in thinking about the repair and actually carrying out the repair themselves. They also encourage people to think about living together in more sustainable communities. Fred: I suppose you could say they are about repairing our minds, not just our things. Lucy: Quite so, although often the two are very closely related. Many people attach (3)sentimental value to old things that might, for example, be part of their family history. Fred: I see what you mean. It almost sounds too good to be true. (a)Is there a catch? For example, how much does it cost? Lucy: Advice and help from the repairers is free, but people who use the café are invited to make a donation. That money is used to cover the costs involved in running the café. If specific spare parts are needed, the repairers will advise you on how to obtain them. Fred: Well, that's marvelous! (e)Then I'll take this old microwave there. Are they open today? Lucy: Yes, and I'll come with you. I've got a pair of jeans that are badly in need of some attention. QUESTIONS 1. Translate the underlined part after (1) into English. 2. What does the underlined phrase after (2) mean? Select the most appropriate expression from the list below. (A) became popular (B) hit a dead end (C) occurred to you (D) played a significant role (E) worked in practice 3. The underlined phrase after (3) means the value of an object which is derived from personal or emotional association rather than its material worth. Give ONE object that has "sentimental value" for you and explain why it has such value. Your answer should be between 15 and 20 English words in length. (Indicate the number of words you have written at the end of your answer.)

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