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Science Junior High

(3)教えて欲しいです🙇‍♀️ こたえは196cm3になります。

図1 マグネシウムの粉末 3化学変化と機質の質量の 図1のようにしてマグネシウムを一定時間加熱し, 皿が冷えた後,質量 を測定し,粉末をかき混ぜる。これを質量が変化しなくなるまで繰り返す。 表は,各班の加熱の回数とステンレ ス皿内にある物質の質量をまとめた もので, 5班はマグネシウムの量が 多く,実験が終わらなかった。 (1) このとき起きた化学変化を,化 4班 0.40 0.49|0.55|0.61|0.64|0.64| つ202回(R2 栃木改)(12点×3) ステンレス皿 図20.4 測定した質量(g) 加熱前の 質量(g]|1回|2回|3回、4回5回 035 酸0.3 1班 0.25 (0.36|0.380.38 45 数(回 25 2班 0.30 0.410.46|0.48|0.48| 質0.2 3班 0.35 0.440.500.540.54| 声6、5 B0.1 こめ。 lo 69101 マグネシウムの質量(g) 学反応式で表しなさい。 7(2) 図2に, 1~4班の結果を●で記入し, マグネシウムの質量と化合し た酸素の質量の関係を表すグラフをかきなさい。作図 5班 0.45 0.52|0.55|0.58|0.59|0.61 0.1 0.2 0.3 0.4 0.5 2Mg +02 0 2MgOし 「3) 5班と同じ0,45gのマグネシウムの粉末に十分なうすい塩酸を加えると,(1) 気体が420cm発生した。 5回目の加熱後の5班の粉末0.61gに, 同じう すい塩酸を十分加えると, 気体は何cm°発生すると考えられるか。ただし,(の マグネシウムと酸素は3:2の質量の比で化合し, 酸化マグネシウムと塩 酸が反応しても気体は発生しないものとする。 計算 ヒント 図2に記入

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English Senior High

答えと解説お願いします!!

子習日 above a nice restaurant. The student ate only once a day before his evening studies (10) )A A Wise Judgment 名判決 Vdados just 1 Many years ago in Japan, a hungry student lived 1n a small room that woo having ーa small *?rice ball. However, . he did not feel he was alone when he was 1) meals in his room. He could smell the delicious food from the restaurant, and b。 restaurant with many could also imagine that he was eating the delicious food at the 5 people he never met. He really enjoyed his dinner time. 2 One day the restaurant owner came to learnwhat the student was doing, and 2) so he asked him for some money. The owner did not want him to smell the food from the restaurant for free. But the student was so poor that he did not have much money at all. So the owner called the police and asked them to *3 °put the student into 10 prison. 3 Soon there was a *4 "court case. *Judge Nomura was very famous because he was so clever. The owner explained the problem with the student. He explained how much money the restaurant needed for all the people who worked there. The student 3) started to worry because he was so poor. Judge Nomura thought for a minute and 15 then began to talk. 4 “It is clear that you must give the owner some money for received from the restaurant," he said to the student. "Do you have any money with what you have 4) vOu2" The restaurant owner smiled. The student found a few coins in his bag and 20 took them out. The judge told him to 6throw them up and catch them. The student * looked sad, but did so. 5) *7made a small sound. “Good!" said Judge The coins Nomura. “The sound of money is enough for the smell of food." I 300 wordsI

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English Senior High

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Scientists **complain about noise **pollution. It damages animals, plants, and people. animals and plants need beautiful music. But they don't like big, *4terrible noises. 学習日 9) The Magic of Music 音楽の不思議な力カ 1 The history of music is very old. People all over the world have always loved it s there anyone who doesn't like music? Probably the answer is no. Music is one of the most necessary things in life. Maybe people can't live without music. Do animals and plants like music, too? Do they understand music? 5 2 Oneday Mrs. Evans read a very interesting story in the newspaper. A *1 "university professor found out that her plants became stronger when music was played for them. At first she thought thatit was a joke, but she wanted to try it 2) herself. She built two rooms in the garden and put the same kind of vegetables in both rooms. The temperature of the rooms was the same and both of them were very quiet. Music was played in one room. The other room was silent. She was 3) 10 surprised to find that the next day the vegetables that she played music for became taller than the ones in the silent room. 3 In the United States, there was a farmer who kept many cows. The farmer was very interested in music. When he stayed at home, he always listened to music on the radio. One day he took his radio to the farm. When he was *2milking his cows, 15 the radio was playing beautiful music. He found that the cows gave more milk *than 1usual on that day. He wanted to know the reason, and three months later he 4) learned that he could get more milk when the cows listened to beautiful, quiet music. 4 Today many scientists say that animals and plants also enjoy music. Like Us, 20 *4 *5 They say that we must think about many kinds of noises we are making every that We day. 1 313 words I

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English Senior High

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学習日 8 The Case of the Dentist's Patient 歯科医院での患者殺人事件 1 Dr. Williams, a New York dentist, was getting ready to take an *"X-ray on the left 1)9 side of his patient, Dorothy Hoover. The door behind him opened silently and hand appeared. It was wearing a white glove and holding an *"automatic pistol. Bang! Bang!Two *°shots sounded. Miss Hoover fell over in the chair. She was 5 dead. 2 “We've got a **suspect for the shooting,"” *5Inspector Winters told his chief at his office two hours later. “The elevator boy took a nervous man up to Dr. Williams' office, a few minutes before the shooting. The boy described the man and I am sure 2) he is John Burton. He was **in prison before. This evening we found him at his 10 *7rooming house. Ive told him that I only want to ask him a few questions." 3 Burton was brought in and he angrily said, “What is all this about?” orno os s “Have you ever heard of a Dr. Williams?” asked the Inspector. uon To bal 6W “No, I haven't. Why?” replied Burton. BA (6 “"Dorothy Hoover was shot to death less than three hours ago as she sat in a chair in Dr. Williams' office," the Inspector explained. 15 “I was sleeping all afternoon," said Burton. “An elevator boy says he took a man who looked ike you a moment before the shots were heard,” the Inspector told Burton. *It wasn't me," Burton insisted. “A lot of 3) *8 guys look like me. I haven't been 20 in a dentist's office since I came out of prison. You are mistaken." We have good *"proof to send you back to “No," *°interrupted the chief, 1 265 words I prison for a very long time!" VB yer bnet

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Science Junior High

2〜3番まで教えてください

18:42 27% 閉じる イオン 2中和と塩 R2 福井改 28 ナトリウム イオン 「実験) ビーカーに入れた塩酸10cm?にBTB溶液を2滴加え,水溶液の色を Xにした。次に、ビーカーに水酸化ナトリウム水溶液を2cmずつ加え, そのつどよくかき混ぜた。水酸化ナトリウム水溶液を20cm加えるまでこ の操作を続けた。 【結果) 水酸化ナトリウム水溶液を12cm入 れたときに水溶液は緑色に変化し,20cm 入れたときには水溶液の色は Yであった。オ C1) X, Yにあてはまる色を書け。 口12)加えた水酸化ナトリウム水溶液の体積と, ビーカーの水溶液の中の水素イオンの数,ナ※横軸は加えた水酸化ナトリウム水溶液の体積(cm), 縦軸はイオンの個数(個)を表す。 I口 ア 20 イ ウ エ 2n 2n 2n n n n n 0! 0 10 20 10 20 0 10 20 0 10 20 カ 2n キ 2n ク 2n 2n n n n IIト シ 0 0 10 20 0 0 10 20 10 20 10 20 トリウムイオンの数の関係を表すグラフを,右上のア~クから1つずつ選べ。? ただし、塩酸10cm中の塩化物イオンの数をn個とする。 口(3) 水酸化ナトリウム水溶液を20cm入れた後に,ビーカーの水溶液を再び 緑色に変化させるには, 実験で用いたものと同じ塩酸を何cm入れるとよい か。四捨五入して小数第1位まで求めよ。 (10点×3) (2)0

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Physics Undergraduate

この2問、教えてください!! 7/25まで!!!

R R。 1.右図に示す4つの抵抗 Ri, R2, R3, R4 からなる回路で、 AからBに電流1 を流した。S のオンオフにかかわら ず電流1が一定になるための条件を 求めよ。 A S 「B R2 R。 (注、S がオンの時の合成抵抗とオフの時の合成抵抗が等しくなることを利用して解く。または、 S の両端 で電位差が所持ないことを利用して解く) 1. 半径 a.b (a<b) の同心の導体球殻 A,B があり、両球 殻に挟まれた空間が、電気伝導率のの電解質溶液で満 たされている。A.Bをそれぞれ正負の電極にして電流 を流した時の電気抵抗を求めよ。 B (注、授業の例題で説明した筒状の導体容器に満たした電解質溶液の電気抵抗を求める問題と、 解決の方針 は同じである。筒状の導体容器の場合は筒に垂直に放射状に電流が流れたが、 同体球殻の場合は、 点電荷 の作る電気力線のように、 中止がから均等にすべての方向に放射状に電流が流れる。 2つの導体球殻の間に 中心の等しい球面 (閉曲面) を考えると、 全電流は球面を貫くので4m()となる (i(r)は電流密度)、 よっ て電場は E(r)-())aから求めることができ、 電極間の電位差を計算すれば電気抵抗を算出できる

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