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理科 中学生

1番最後の問題が解説を見ても分かりません。 よろしくお願いします🙇‍♀️

72000 J) (2)1200Wで1日あたり6時間, 25日間使用したとき, 電力量は何Whか。 ( 180000 Wh) 図1」 4 電力 電流のはたらきを調べるため,次の実験1,2を行った。 [愛媛県] 〔実験〕 抵抗の値が2.0Ωの電熱線を用いて, 図1のよう な装置をつくった。 点Pと点Qとの間に加える電圧を6.0V に保ち、5分間電流を流しながら水温を測定した。 次に、 電 熱線a a を電熱線bにかえて, 点Pと点Qとの間に加える電 圧を6.0Vに保ち、5分間電流を流しながら水温を測定した。 表は, その結果を表したものである。 [実験2] 図1の電熱線a を, 電熱線a と電熱線bを直列につないだものに かえて, 点Pと点Qとの間に加える電 圧を6.0Vに保ち, 電流を流しながら水温を測定した。 水温 電熱線 a [℃] 電熱線b ただし,実験1・2では, 水の量, 電流を流し始めたときの水温, 室温は同じであり, 熱の移動 は電熱線から水への移動のみとし、 電熱線で発生する熱は全て水温の上昇に使われるものとする (1) 実験1で, 電熱線 a に流れる電流の大きさは何Aか。 図2 (3.0A) (2)実験1で,電熱線に電流を流し始めてからの時間と 電流を流し始めてからの水の上昇温度との関係はどうな るか。 表をもとに,その関係を表すグラフを図2にかけ。 (3) 実験1で,電熱線aが消費する電力と電熱線bが消費 する電力の比を, 最も簡単な整数比で書け。 ( 2 (室温は16.4℃である) 電流を流し始めて 〔分〕 からの時間 :31 4 (4) 次の文の①,②の { }の中から,それぞれ適当なも イ 200秒後 ウ 450秒後 し始めてからの水の上昇温度 5.0 24.0 13.0 2.0 1.0 1 3 4 5 0 2 16.4 18.0 19.6 22.8 24.4 16.4 17.2 18.0 18.8 19.6 20.4 21.2 (① '0 電源装置 Q+ レガラス棒 FREEST 900秒後 ( 9点×5) FU% 一発泡ポリスチレン容器 170 ・電熱線 a スイッチ KA 8888 電流計 のを1つずつ選び, その記号を書け。 ②イ 実験2で, 電熱線aと電熱線bのそれぞれに流れる電流の大きさを比べると, ① {ア が大きい, イ 電熱線bが大きい, ウ同じである } 。 また,実験2で、電熱線aと電熱線b のそれぞれが消費する電力を比べると, ② {ア 電熱線a が大きい, イ 電熱線bが大きい, ウ同じである}。 (5) 実験2で、電熱線に電流を流し始めてから、水温が4.0℃上昇するのは何秒後か。次のア~エか (ウ) ら選べ。 ア 100秒後 1 2 3 4 5 電流を流し始めてからの時間 〔分〕 電熱線a 57 2 年 4 (2) 電熱線bを用いたとき の水の上昇温度は, 1分後が 0.8℃, 2分後が 1.6℃, 3分後 が 2.4℃ 4分後が 3.2℃, 5分 後が 4.0℃。 (3) 5分後の水の上昇温度は, 電熱線a: 24.4-16.4=8.0[℃] 電熱線b:20.4-16.4=4.0[℃] 水の上昇温度は電力に比例する ので,電熱線a が消費する電力 と電熱線bが消費する電力の比 は,8.0:4.0 =2:1 (4)② (3)より, 実験1で電熱線b を用いたときに回路に流れる電 流は、電熱線を用いたときの半 分なので, 1.5A。 よって, 電熱 線 bの抵抗は, 6.0 ÷ 1.5 = 4 [Ω] P=IRより、電流が同じ とき, 電力は抵抗に比例するので, 消費電力は電熱線b のほうが大 きい。 (5) 実験1より, 電熱線b の電 力は, (1.5[A])2 x 4[Ω] = 9[W] 水温が4℃上昇するのに5分か かったので熱量は, 9 〔W〕 × 5 また実験 x 60[s] = 2700[J] 2で、全体の抵抗は, 2 + 4 = 6〔Ω], 電力は,(6[V])÷6 [Ω] = 6〔W〕 水温が4℃上昇 するのにかかる時間を ts とす ると, 6〔W〕×[s] = 2700[J] t = 450〔s〕

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英語 中学生

この問題が分かりません。 答えを教えてください

5 次の英文は、あやさんとカナダ人のケイトさんとのEメールのやりとりです。これを読んで、問いに答えなさい。 【あやさんからのメール】 Hello, Kate. How are you? I'm happy because I can meet you soon. I'm studying English very ( ). I want to make my stay wonderful. My friend told me that she went to America last year and made many friends there. I think that is great. When I visit Canada, I would like to experience many things there. I would like to know, "How do young people live?" "What are young people interested in?" That will help me. So I have to visit many places. In Japan, I especially like visiting free markets. I like to go ( 3 ) at my favorite free market and buy old things. Can we visit a free market in Canada? Please write me soon. 【ケイトさんからのメール】 Hi, Aya. Thank you for your e-mail. You will come to Canada next Thursday. I can't wait to e use "flea" for the see you. In your e-mail, you said you wanted to go to a "free" market. But we use market's name. I heard that a long time ago people sold clothes and there were sometimes fleas in them. Oh, I have something important to say. Now when people sell things, they usually clean the things. So you don't (5) worry when you buy something. Why do you use "free" for the market's name? There are many people there, so you can We usually go to a flea market in the big park. ). Let's have a good time. See you soon. market (s) especially 特に (注) experience ~を経験する flea(s) 蚤 (のみ : 体長1mm以下~9mm程度の小さな虫) clothes

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英語 中学生

⑴がわからないです!よかったら教えてください💦 長文読解のコツとかもあったら教えてくれると嬉しいです✨

次の英文を読んで、あとの問いに答えなさい。 <千葉日大第一改 J.K.Rowling is the author of the Harry Potter books. J.K.'s name is *Joanne Kathleen. She was born in 1965 in a small town near *Bristol, England. Joanne lived with her parents and her sister. The Rowling family was not rich. Joanne did not go to special schools. ( 1 ) She loved to read and write stories. Joanne went to *Exeter University, and she graduated in 1987. After graduation, she moved to London and worked there at different office jobs. In her free time, she wrote stories. In 1990, Joanne's mother died, and she was sad. ( 2 ) She saw an *ad in the newspaper for a job as an English teacher. The job was in *Portugal. She had an *interview, and she got the job. In Portugal, Joanne married a Portuguese man. The next year, Joanne had a daughter, but she was not happy in her marriage. She left Portugal with her daughter and went to live in *Edinburgh, Scotland, near her sister. Life was very difficult for Joanne. She took care of her daughter. She was alone, and nobody helped her. She had no money and no job. Then one day, on a train, she thought about the Harry Potter story. She began to write that story. Joanne liked to go to a coffee shop to write. (3) She drank coffee and wrote. Her daughter slept beside her. After five years, Joanne finished writing the first Harry Potter book. She sent it to many book publishers. ( 4 ) Finally, a publisher liked it, but the publisher said, “This is a children's book. Adults won't read it. You won't make a lot of money." In 1997, Joanne's dream to publish her book came true: Harry Potter and the Sorcerer's Stone was in the bookstores. Children and their parents loved the book, and it became famous all over the world. Now Harry Potter is in sixty-five languages. The publisher was wrong about one thing: Everyone loves Harry Potter children and adults. Over 100 million books were sold in 1999. Then two Harry Potter books became popular movies. J.K.Rowling wrote four more Harry Potter books after that. All those books became movies, too! On January 11, 2007, J.K.Rowling finished her seventh and last Harry Potter book. She will continue to write, but not Harry Potter books. The question is, what will people do without Harry Potter? 注 Joanne Kathleen ジョアン キャスリーン(人名) Bristol ブリストル Exeter University エクスター大学 ad Portugal ポルトガル (国名) interview Edinburgh エディンバラ (地名) (1) ①~④の( に適するものを,ア~エから1つずつ選び,記号で答えなさい。 She sat there for many hours. 7 She wanted to leave England. They said that they didn't like it. 詞 (3) (2) 本文の内容にも I She was a quiet child. D( ) @ ( ) 3( ) 4( )

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英語 中学生

⚠️至急です これ解いて欲しいです!

【選択 A Mai: Jack: Mai: Jack: Mai: Mai: Jack: Mai: Jack: 【共通問題】 ([2]~[8]) 2 次の対話文を読んで、あとの各問いに答えよ。 Jack is a student from the UK. He is in Japan to study Japanese. One day, he is talking with his Japanese friend Mai after school. Mai: Jack: Mai: Jack: Mai: Jack: Mai: Jack: Mai: Jack Do you have any plans for next Sunday, Jack? No, I don't. Why? Yes, of course, we do. I didn't know that. In the U.K., we usually don't need money when we enter museums. Really? In Japan, we usually need money. Why are museums free in your country? Because everyone should enjoy the arts. The government thinks so. That's nice. I think museums need a lot of money. For example, they have to take care of the artworks there. They need people to do that. How do they get money for them? Well, they have some ways. First, the government gives some money to museums. Second, in museums, there are some shops and restaurants, and (B) Third, they sometimes lend their artworks to other museums and get money. Lastly, there are also donations from people. Donations? Do you know Aoba Museum? How about going there with me? Aoba Museum? Oh, it's a new museum near the park, right? Yes! I want to go there. Good. We can see many beautiful pictures by some artists from this city. Is that so? O I have discount tickets, so we can use them. Well, do you need money to enter museums in Japan? Yes. Rich people sometimes give money to museums to help them. Also, there are some donation boxes in museums. When we visit museums, we usually put money in the boxes. That's good. Many people help museums. ② My country has a lot of good museums. I want to visit some with you. Good. Then, I can put money in the donation boxes for the museums! (注) artist one day ある日 イギリス the U.K. the arts free 無料の enter入る lend t artwork # discount ticket government H lastly 最後に shop money take care of ~ ~の手入れをする donation #1 rich 裕福な (1) [①②に入れる文として最も適当なものを、次のア~オの中からそれぞれ1つずつ選び、その 記号を書け。 ただし、同じものを二度使わないこと。 ア You are welcome. 1 33 I オ I'm sorry, but I can't. You are right. No, you can't do that. Sounds interesting. (2) () that が指している内容として最も適当なものを、次のア~オの中から1つ選び、その記号を書け。 Mai has discount tickets for them, but Jack needs some money. ア People usually need money when they enter museums in Japan. 1 In the U.K., people don't need money to enter museums. I The U.K. government thinks that everyone should enjoy the arts. * Museums in Japan need a lot of money to take care of the artworks there. (3)(B) に入る最も適当なものを. 次のア~エの中から1つ選び、その記号を書け。 7 museums can get money from them 1 people can take pictures of the food there people can learn the way to make money for museums I a lot of people want to learn something about the arts (4) 次の英文を本文の内容に合うようにするとき. 出して書け。 Mai wants to go to a museum with Jack. They are going to visit the museum next Sunday. Jack tells her about museums in his country. Mai learns that museums in the U.K. are free, and there are donation boxes in museums. When she goes to some, she wants to put money in the boxes to 6 the museums. 0⑥に入る最も適当な1語を. 本文から抜き

解決済み 回答数: 1