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Physics Senior High

なぜ赤線のことが言えるのか教えて欲しいです 保存力しか働いていないから力学的エネルギー保存則が成り立っているなと思ったのですがどうやって図示してそのことを表すのか そして なぜエネルギーの言葉の前に(落下した水の)=(はじめの)という言葉が必要になるのかもわからないです ... Read More

一法関 基本例題28 熱と仕事 ►►► 74,75 アフリカにあるビクトリア滝は落差110m, 水量は毎分1.0×10m² といわれる。重力加速度の大きさを 9.8m/s', 水の密度を1.0×10°kg/m?, 水の比熱を4.2J/(g・K) とする。 (1) 落下した水の運動エネルギーがすべて熱に変わるとしたとき, ビクトリア滝で1秒間に発生する熱量Q〔J〕 を求めよ。 (2) (1)の熱量が水温の上昇に使われたとして, その温度の上昇4T〔K〕を求めよ。 仕事) (3) この水を利用して水力発電を行うとして,得られる出力(仕事率) P 〔W〕 を求めよ。ただし,水車の効率は 50% とする。 指針mgh [J] の質量mの単位にkg を用いるので,熱量の計算にはm×10°〔g〕 として用いる。 落下した水の運動エネルギー=はじめの位置エネルギー 解答 (1) 1秒間に落下する水の質量m[kg〕は (1.0×105)×(1.0×10³) _ 108 60秒 60 m=- -kg 1秒間に発生する熱量は, 1秒間に失われる力学的エ ネルギーに等しいから 108. Q=mgh= -X9.8×110 60 = 1.79... ×10° ≒1.8×10°J Let's Try! 位 BEL 第6章 熱とエネルギー 61 どんか度 (2) Q=(m×103)×c×4Tより AT= to 3 ?? Q mgh gh 10°C mc×103 mc×103 = 0.256...≒0.26K (3) 仕事率は1秒当たりにした仕事で (1) Q に等しいか ら 50 100 =(1.79×10°) x P=Qx = 8.95×10°≒9.0×10°W 9.8×110 103×4.2 50 100 たが REME 7、物 ネル

Resolved Answers: 1
English Junior High

リーディングの問題です。 色付き下線部の英文の訳し方がよくわかりません。 どのようにして,回答のようになるのか教えて下さい🙇‍♀️

3 Jill, Ellen, Bob, and Edward lived near a lake/They could go for a swim every day. A man named Mr. Black lived near the lake, too./Sometimes Mr. Black went swimming with the children. One day they asked him to go for a swim with them./Mr. Black said "We can't go for a swim. We may never swim in the lake again." "Why not?" asked Edward. "Because the lake is polluted," said Mr. Black. "There's a new sign at the lake. It says No Swimming, Polluted." "What is polluting the lake?" asked Jill. "Let's go down to the lake and look at it," said Mr. Black. (ア) Mr. Black and the children went to the lake on a sunny Sunday. They looked into the water. It wasn't clean/They walked around the lake and they saw why it wasn't clean. “Look at that *garbage in the water," said Jill. "That's what's polluting the lake.” Edward saw oil floating on the water./"That oil pollutes the water, too,” said Edward. "It comes from boats on the lake." "Come here," said Ellen. "Take a look at this. There are tires in the lake !" "Why would people throw tires into a lake ?" asked Bob. "They just don't stop to think," said Mr. Black. "But they are not the only ones who pollute the lake. The people who run that factory pollute the water, too." Bob looked at Mr. Black/"What can we do? How can we stop the pollution ? he asked. "Well, we must get help from other people. We can't do it alone," said Mr. Black. Mr. Black had a friend who worked for a newspaper company. He asked him to help. The next day the story about the pollution was reported in the newspaper. Many people read about the story. They talked of the pollution. They talked of ways to clean it up. people met at the lake./They came to clean it up./ They cleaned out the garbage. Then they cleaned out the tires./They set up big cans. Then they put signs on the cans. The signs read, "Put Your Garbage Here." /People who lived near the lake came to help./People who had boats came to help./And, people from the factory also One day (イ) came to help. They knew that it would take a long time to get the lake clean again. But they did not give up. They all hoped that someday the "No Swimming” sign would come down and the people could swim in the lake again. 注) 〒garbage=ごみ

Resolved Answers: 2
English Junior High

英語の長文問題についてです. 問4の(3)の答えは、特にそのようなことを言っていないし、「城の前にお菓子の店に行く」とあったので、 ✕ だと思ったのですが、答えは○ でした ,, どこから(3)が○だと推測できるのか教えて頂きたいです … … 文が長いのと書き込みが多くて... Read More

5 110 S 次のアヤカ (Ayaka), サトル (Satoru), カレン (Karen), マイク (Mike) の4人による会話を読んで、あと の問いに答えなさい。 なお、会話文の上にあるのは、4人が見ている, あかね市のおすすめの (recommended) スポットについて書かれたチラシ (leaflet) の内容です。 おすすめスポット ・甘味堂 食事処 えびす ◆Hiro'sキッチン □さざなみ城 □わかば城 □さつき城 ●あかつき堂 ●おもいで屋 ~あかね市のおすすめスポット9選!~ 営業時間 ●ダイキチ 編集部コメント AM9:30~PM8:00 日本の伝統的なお菓子を取り扱うお店です! AM9:00~PM10:00 昨年国内和食店人気No.1を獲得したお店です! AM10:00~PM9:00 様々な国の料理を提供しているレストランです! AM9:00~PM4:00 580年という長い歴史を刻んだ城は,一見の価値あり! AM10:00~PM5:00 今年で築城450周年! 記念イベント開催中! AM9:30~PM4:00 1480年に誕生した。 今もなお多大な人気を誇る城です! AM11:00~PM4:00 日本の伝統的なものを買うならココが一番! | お土産の定番がそろっているお店です。 何を買うか迷った らまずはココ! 外国人にも人気の伝統的な茶わんやお箸などの商品を数多 く取りそろえています! ・・・・飲食店 □・・・城 ●・・・お土産屋 (※情報は2020年4月現在のものです。) Ayaka Now, let's talk about the places to visit during our stay in Akane City. We are going to meet at Wakaba Station at ten in the morning. Where do you want to go after that? Tell me your ideas! 0 S Japaneye hirtory Satoru: Akane City has a lot of old castles, so I want to visit one of them. I like old castles very much. Karen Me, too. I'm interested in Japanese history. I think I can learn (about it by visiting the castles. Mike : This leaflet says that there are thro | recommended castles. Which do you want to visit? Satoru : I want to visit the oldest one. We may learn a lot of things there. S Karen I think so, too, Satoru. Let's visit this castle! AM9:00~PM7:00 AM10:00~PM6:00 Ayaka OK! Where do you want to have lunch? S Karen How about this restaurant? The leaflet says we can have dishes from different countries there. That sounds nice. Sc visiting the castle) Satoru That's a good idea! S=C S 0 Mike : Can we go to a *souvenir shop? I want to get some S=C my country. 5 0 I want to them, too. 9 - 0 C Satoru : Karen, look at this *map. That restaurant is too far. Karen: Oh, you're right. Then we should go to another restaurant. S Mike : Then, let's go to this restaurant on the leaflet I wănt to have Japanese dishes for lunch. Karen: That's good. But I'm also interested in this restaurant because I like Japanese *sweets very much. Ayaka: Then, let's have some sweets (before visiting the castle, and go to this restaurant for lunch after map 2 traditional | things in Japan for my family in Karen V Satoru Then, these two shops are good. But Ⅰ don't think we have time to visit both. Ayaka You're right. Ⅰ think this shop is better for us because the map shows it's in Wakaba Station. 1 受け身(受動態) チ 12 には し 問:

Resolved Answers: 2