寒気が暖気よりも密度が大きいのってなぜなのですか? よろしくお願いします🙇

空気が膨張するときにエネルギーを使い、温度が下がるのはなぜですか? よろしくお願いします🙇

この問題はどのような解法が一番最善策でしょうか? よろしくお願いします🙇

AB=AD=3, BC=8,CD=5とする A D ・B 0. (1) ACの長さを求めよ。 (2)円〇の半径を求めよ。 C

|x＋2|+|2x−3|<10はどのように解けばよいのでしょうか? よろしくお願いします🙇

この問題が分かりません！ 解説があるんですけど、どういうことか分からなくて教えて欲しいです！

24 粗い水平面上の運動 粗い水平面上で、物体を初速度で点から滑 らせると、点Pまで進んで止まった。 物体と床の間 の動摩擦係数をとし、重力加速度の大きさを とする。 0 Vo (1) OP 間の物体の加速度α を求めよ。 ただし, 初速度の向きを正とする。 (2) OP 間の距離Lを求めよ。 考え方 Vo 停止 P 与えられていない物体の質量を文字で表し, 垂直抗力, 動摩擦力を式で表せるよ ?にする。 [解説] 1) 物体の質量をm, 垂直抗力の大きさをNとすると,N=mg N => これより運動方程式は、 動摩擦力の大きさは,F' =μ'N =μ'mg ma=-μmg よって, aμ'g 2) (1)より, 物体は等加速度直線運動をするので, 02-002=2ax より, 02-vo2=2(μ'g)・L よって, L= 2002 2μ'g [F] mg

（2）がわかりません。どのように解けばよいのか教えて欲しいです。 よろしくお願いします。

6 P <XOT=60°の内側に3つの円,P,Q.Rが 全て接している。円の半径は6である。 (1)円Qの半径を求めよ。 0 R (2) ARの面積を求めよ..

(3)でなぜyou have beenになるのか分かりません。 疑問文はhave you beenになるのではないのですか？

*return 返す (2) A: What are you reading? B: I'm reading a book written by Haruki Murakami. He (people/to/is/known/many) in the U.S. He is knowth to many people. (3) A: Is (you/been / the notebook / this / have) looking for since yesterday? B: Yes, it is. Where did you find it? A: Well, it was in my bag. ) in the U.S. Is this the notebook you have been ) looking for since yesterday?

英語の問題です。 教えて欲しいです🙇‍♀️

(2) I had my teeth 1 check 1( )に入る最も適切な語句を ① ~ ④から選びなさい。 (1) He went on speaking as if she ( 1 can't 2 hasn't ) there. Son 3 wouldn't ) by a dentist this morning. ult niles 3 checking wahiwon (青山学院大 ) ④weren't pomibinand (岩手医科大) 24 to check 2 checked (3) You should not keep any pets ( 1 after 2 unless ) you can take good care of them. 3 when (中央大) ④which 1 as 2 in ) all be correct. ②anytime (6) If the weather ( ①must have been (4) This town will change ( ) another ten years. (5) Those may not ( 1 absolute ) fine yesterday, I would have done the laundry. 2 is (7) Studying takes up a lot of my time during the week, ( ) little time for hobbies. (芝浦工業大) since 3 of (國學院大) 3 everything ④necessarily (関西学院大 ) ③ wasn't 4 had been (皇學館大) ①1 has left (8) Have you heard the rumors ( 1 that 2 what leaves leaving 4 left ) Susan has returned to this town? ③ which (麗澤大) ④ who 1 by (9) What was found in this experiment is ( 2 for (10)( ) what to say, she remained silent. ) great importance to researchers. 3 in (立命館大) 4 of (愛知工業大) 1 Not knowing 2 Being not knowing ③No knowing ④Knowing no (11) I tried to ( 1 have 2 make ) her to tell me what happened last night. 3 get (十文字学園女子大) 4 let How gimon and (12) Do what you like, as ( 1 far 2 much B in 1 in 2 with bnat am ) as you leave me alone. 3 long (13) This tool is dangerous. Please read the instructions ( (14) If I hadn't drunk so much last night, I ( 1 feel (15) I wish you 1 attend (16) If I ( 1 were ) 2 will feel ) the party yesterday. 2 were attending ) much better than I do right now. ③ would feel ③ have attended (中京大) 4 would have felt (目白大) ④had attended ) in your situation, I would be more careful about what you post on social media. (フェリス女学院大) 4 many ) care. (聖隷クリストファー大) at ④take gwol 3 will be (南山大) ④would be

この問題の答え合ってますか？ 大問2から4まで教えて欲しいです！

) 内に適切な前置詞を補いなさい。 1. She was dressed ( in 2. I'm tired ( of 3. We were caught ( ) black then. ) doing the same things every day. in ) a storm on the way. 4. All the hotels here are crowded (with ) skiers. 5. We are not satisfied ( 6. His name is known ( to 7. The little boy was very pleased ( 8. My daughter is interested ( with ) your explanation. with in ) all the people in the town. ) the toy. ) world history. 9. Your mother will be delighted ( with ) the results of the test. 日本文の意味を表すように( 内に適語を補いなさい。 1. 多くの人々が第二次世界大戦で亡くなった。 B Many people ( died ) ( world ) World War II. 2. ケンのいとこはその交通事故でひどいけがをした。 Ken's cousin ( was ) seriously ( injured ) ( in ) the traffic accident. 下線部に適切な語句を補い、 受動態の文を完成しなさい。 They say that he is a world authority on physics. I is said to be 1. He People believe that the moon moves around the earth. a world authority on physics. 2. It is moved around the earth. The moon is believed to move around the earth. C 回 B

この問題の解き方が分かりません！ 答えを見てもよく分からないので教えて欲しいです！

2 高さ19.6mのビルの屋上から小石を自由落下させた。 地面に達する直前の小石 の速さは何m/s か。