明日テストです。誰か分かる方助けてください！ 例題20-⑵ 力学的エネルギーとバネの問題が わかりません🙏🙏🙏🙏

ばねによる振動と力学的エネルギー 例題20 ためらかな水平面上の壁に,ばね定数 5.0N/m のばねの一端を固定し,他 →基本問題 132, 標準問題 135 端に質量0.80kg の物体をつける。 ばねが自然の長さとなる点0から物体 を引いて、4.0×10-2m伸ばした点Aで静かにはなすと, 物体は水平面上 4.0×10-2m 00000000 を振動した。次の各間に答えよ。 (1) 点Aにおける物体の弾性力による位置エネルギーは何Jか。 (2) 物体が点0を通過するときの速さは何 m/s か。 (3)ばねの縮みの最大値は何mか。 づ×540.04= a10 2.10 0.106 物体はばねの弾性力だけから仕事をされるの 指針 で,その力学的エネルギーは保存される。 (1) U=→kx? を用いて計算する。 (2) 点0では,ばねが自然の長さであり, 物体の弾性力 による位置エネルギーは0である。 (3)ばねの縮みが最大となる位置では, 物体の速さが 0となり, 運動エネルギーは0となる。 解説 -×5.0×(4.0×10-3)?=Dx0.80×° 2 2 0=0.010 リ=0.10m/s (3) ばねの縮みの最大値をx[m]として, その位置と点 Aとで,力学的エネルギー保存の法則の式を立てると, ×5.0×x=ラ×5.0×(4.0×10-) (1) 弾性力による位置エネルギーU[J]は, x=(4.0×10-2)? x=4.0×10-°m U=-kx?=;×5.0×(4.0×10-)* Advice ばねにつながれた物体の振動では, 振動の中 心で速さが最大, 振動の両端で速さが0となる。 =4.0×10-3J (2) 点Aと点0において, カ学的エネルギー保存の法 則の式を立てると, Dacio

教えてください！

仮定法を使った表現1 (I wish +仮定法)「(今)~すれば[であれば]なあ」、 「(あのとき)~したら[であったら]よかったのに」 (as if +仮定法)「まるで~する[である]かのように],「まるで~した[であった]かのように」. ■(f only +仮定法) 「~しさえすればなあ」。 「~しさえしていたらよかったのに」。 ■(t is (high) time + S +仮定法過去) 「もうs は~してよいころ[とき]だ」。 O A 次の( )から適切な語句を選びなさい。 15. I wish I (am / were) a bird. 16. I wish I (have studied/ had studied) English harder. 17. I wish he (has not failed / had not failed) the examination. 18. I wish it (will stop / would stop) raining. 19. He acts as if he (is / were) a gentleman. 20. He talked as if he (made / had made) this building himself. 21. My mother speaks as if she (is / were) a teacher. 22. He told me about the novel as if he (read / had read) it. 23. If only I (can / could) meet Mary. 24. If only I (took / had taken) his advice at that time. 25. If only I (can / could) speak English as well as Kenji. 26. If only he (went / had gone) to the concert last night. 27. It is high time you(go / went) bed. 28. It's already eight. It's high time you (leave / left) for work. B次の日本語の意味に合うように, ( )に適切な語を入れなさい。 )I could swim. (泳げればなあ) ) she ( 29. I ( 30. She talks( )C ) the actress. (まるでその女優に会ったことがあるかのように) 31. If ( )I had my own car. (自分の車さえあればなあ) 32. I ( ) bought that book. (買っておけばよかった) 33. I ( ) there ( ) forty-eight hours in a day. (48時間あればいいのに) 34.( ) gone there with him. (行っていればよかったのに) ) home. (もう家に帰る時間ですよ) 35.( ) is( ) you( 36. I ( ) that summer in Hokkaido. (北海道で過ごしていたらなあ) ) he ( )a movie star. 37. He talks ( (まるで映画スターのように) ) Some- ) she( 38. She looks ( thing strange. (不思議なものでも見たかのような顔をしている)

【写真】の読むとき、どこを区切りればよいのか教えてほしいです。

Do you know how many children there are in the world? I thought there were 3 million Cnaren in the world. In reálity, there are 2.1 billion children in the world. Do you think they all are Iiving sáfely and cómfortably? It is not true. 356,000 children are troubled by poverty. I Khew foreign children were troúbled by póverty, but I didn't know Japanese children were troubled by póverty. 1 in 7 Children in Japan live in poverty. I was surprised to hear that. Japan is not at war and not a poor country. It is an advanced and developed nation. So, why does it have this problem? 「nere are many causes. First,non-regular employmentis increasing. Non-regular employees don't get enough money and they don't have a stable job. Second, the number of elderly people is increasing. When the number of elderly people increases, it burdens Japan's workload. Finally, single-parent families are increasing. So how can we solve these problems? The first is food support. For example, there are certain projects and corporations that carry out food services and children's cafeterias.Certain food services are free for low-income single-parent families. Children's cafeterias' dishes are free or low price for children. There are about 12 children's cafeterias in Koriyama. Second, schooling support. Children can go to supplemental school and go to lessons set up by a support group. There are various ways to solve the problem. What can we do for poor Japanese children? I think we should understand this present condition and donate money. I want to be a member ofa support group. The day when children in Japan and around the world can live safely and with peace of mind Willit come?I hope that children around the world, including Japan, can live safely and securely. Through the SDGS, I hope we can secure happiness for all children.

【写真】を読む時に… •アクセントをどこに付ければいいのか •どこできって読めばいいのか •繋げて読む部分はどこか •語尾を上げる又は下げるところはどこか を教えてほしいです。

Do you know how many children there are in the world? I thought there were 3 million Chiidren in the world. In reálity, there are 2.1 billion children in the world. Do you think they all are Iiving sáfely and cómfortably? It is not true. 356,000 children are troubled by póverty. I Knew foreign children were troūbled by póverty, but I didn't know Japanese children were troubled by póverty. 1 in 7 Children in Japanlive in poverty. I was surprised to hear that. Japan is not at war and not a poor country. It is an advanced and developed nation. So, why does it have this problem? There are many causes. First,non-regular employment is increasing. Non-regular employees don't get enough money and they don't have a stable job. Second, the number of elderly people is increasing. When the number of elderly people increases, it burdens Japan's workload. Finally, single-parent families are increasing. So how can we solve these problems? The first is food support. For example, there are certain projects and corporations that carry out food services and children's cafeterias.Certain food services are free for low-income single-parent families. Children's cafeterias' dishes are free or low price for children. There are about 12 children's cafeterias in Koriyama. Second, schooling support. Children can go to supplemental school and go to lessons set up by a support group. There are various ways to solve the problem. What can we do for poor Japanese children?1 think we should understand this present condition and donate money. I want to be a member of a support group. The day when children in Japan and around the world can live safely and with peace of mind Will it come?l hope that children around the world, including Japan, can live safely and securely. Through the SDGS, I hope we can secure happiness for all children.

物理基礎の問題です。汚くてすみません… 2番がよく分かりません…まず1.2×10^9ができないです、

N162. 熱機関の冷却 熱効率40%, 仕事率 8.0×108W の熱機関がはたらいている。 熱 熱機関 仕事 (1) この熱機関が, 高温の熱源から受け取る熱 量は毎秒何Jか。 41 3- 2.04 (613 20f18 冷却水へ O4- e 20.40- (2) 熱機関を繰り返しはたらかせるためには, 熱機関を水で冷却し続けな ければならない。 冷却水1.0kgで 2.0×10*Jの熱量を外部に捨てることが できるとして,毎秒何 kg の冷却水が必要か。 t° ) (sht 1sあたりにれく

この問題が分かりません教えてください

Lesson 19 , od ne mi m om a get their support. 5 He himself was through far-reaching reforms. He abolished slavery, introduced a *bureaucracv and 298628 ig piaum. ofh al nao o litmo of the 2010s, donated about 90% of his salary to charities which helped poor people. The he was often described as the world's *humblest head of state. Not all leaders are like them. Unfortunately, some leaders only care about their statis 15 When their popularity declines, they often try to shift the criticism onto others so as to maintain their power. The class system during the Edo period aimed at dividing people into classes and giving them contentment by encouraging them to look down on the lower classes. Hitler managed to win people's support by setting *Jews up as their enemies. It is quite difficult to satisfy everybody and unite a nation. Nevertheless, good leaders smo ons Tanolaom nd listen to people's voices, including critical ones, to make better policies for the welfare of 20 naw asng-1agie all the people from the perspective of national interests. So when you are qualified to vote, collect as much information as possible about candidates and political parties. It will help Coo b you judge whether they are willing to create a better society or are just trying to ake 25 advantage of their status for their own benefits. Your single vote can make a big differèIto to our future. oiauM 9oitasrf o eysW ) 363 words

空所に適切な語句を入れる問題でaが入るのですが、訳はどうなりますか？なぜaが入るかの説明もお願いします

20. Patricia's father advised her to ( ) the benefits of the plan against the costs. a. weigh b. tie c. rely d. link

答えが無くて、わかるものだけでも良いので教えてください。 丸ついてるのは関係ありません。

1. Most of the people who listened to the band/seemed with their performance. (A) excitement (B fun C) Ampressed D moving 2. Her father offered to turn down the radio/so that she could concentrate on her homework, but she said she didn't bother (B)/matter (C) ymind D need 3. They prefer to keep their old houses rather than building new ones it is very hard ánd expensive to maintain older ones. (A)/because even though on the contrary D) regardless 4.A more advanced model (of this computer SOOn. (A) has been introduced B) is going to introduce (C) is introducing D)/will be introduced V 5.I wish you making that noise. are going to stop B)had better stop (C) have stopped (D) would stop

この問題の意味と解き方がわかりません。

例題16 力がする仕事 基本問題 108. 109, 標準向腿 11 図のように,水平面上に置かれた質量 m[kg]の物体にひもをつけ, 水平 から30° の向きにF[N]の力を加え続けて, ゆっくりと Im]移動させた。 この間,ひもの張力, 動摩擦力が物体にした仕事はそれぞれ何Jか。 m [kg] F[N] イ30° 130° -1[m] 旨針 W=Fscosθの公式を用いて計算する。ゆっ くりと移動させているので, 物体にはたらく力はつりあ っており,動摩擦力の大きさは, 水平方向の力のつりあ いから求められる。 解説 ひもの張力がした仕事 W. [J]は, 動摩擦力がした仕事 W。は, W=Fs cos0の公式を用い ると,動摩擦力が物体の移動する向きと逆向きにはたら くことを考慮して, 3 FL (J) 1 5 V3F W2=- 2 ×1Xcos180°=- 2 3 FLJ) Advice カFがする仕事は, (水 平方向の分力)× (移動距離) からも V W=Fscos0 から, W=Flcos30°= 2 動摩擦力の大きさをf[N]とすると, 物体にはたらく水 平方向の力のつりあいから, 求められる。水平方向の分力の大き V3 さは,Fcos 30°== Fである。こ 30° の値は,直角三角形の辺の長さの比 を利用しても求められる。 13F Fcos30°-f=0 f=Fcos30° 2

12,15,16,18解説お願いします

[2]次の空欄(I 一つずつ選べ。 |20)に入れるのに最も適当なものを,それぞれ下のア)~のうちから Kenta is someone 回 opinions I usually agree with. (ア) which () whom (ウ) who (エ) whose This morning Matt told me he was fine, but now he 12 sick. (ア) seems (1) is seeming (ウ) seems to ) is seeming to These photos remind me 13 my childhood in Ohio. () on (ア) in (ウ) of (エ) to My mother always made me |14 carrots. (ア) eat (1) eating (ウ) to eat (エ) eaten One of the 1回 for becoming a U.S. astronaut is to have flown jet aircraft for at least 1,000 hours. (ア) advances (イ) advantages (ウ) techniques (エ) requirements On a long journey, 16 baggage you have, the less you'll have to worry about. (ア) less (ウ) the less (エ) the least (イ) least Why 回 university students have part-time jobs? (7) do you think (1) do you like (ウ) you think (エ) you know In many countries, the price of fresh and healthy food is 18 the reach of low-income families. (ア) out (イ) beyond (ウ) into () with Iwish I 19 maintain a better relationship with my section manager. () could (ア) can (ウ) was able ( were able Making mistakes is not bad 200 learning to speak English. (7) though (イ) however (ウ) when (エ) but - 407 -