時間についてなかなか理解出来ません。そもそも図がないのでt=t(0)の時、音源や音波はどういう状態なのか、なぜ、tをt+t(0)とみなせるのか。教えていただければ幸いです。

Ⅰ. 次の文の空所 速さを Vとする。 あ にあてはまる数式を,解答用紙の所定欄にしるせ。ただし、音の 図のようにばね定数kの軽いばねの一端を天井に固定し、 もう一端に質量mのスピ カーをつないだ。 スピーカーは周波数の音波を発している。 つりあいの位置から真 下に D だけばねを伸ばした位置から静かにスピーカーを離したところ, スピーカーは鉛 直方向に単振動をした。 スピーカーが単振動を始めた時に発した音波が床に達した時刻を t=0 とすると, それ以降スピーカーの真下の床で聞こえる音波の周波数fは. f= あのように時間変化した。 ただし, スピーカーは音波を発していてもいなく ても同じ単振動をする。 また, D はスピー カーから床までの距離に比べて充分に小さい とする。 天井 ばね スピーカー A l l l l l l l l l l l l l d

(2)で、向心力をSsinθとして計算していますが、mgtanθが向心力として等速円運動していると考えて計算してもいいのでしょうか？教えてください🙏

例題1 円錐 右の図のように、軽い糸の端に質量mの小さなおも りをつけて振り子をつくり, おもりを水平面内で等速 円運動をさせる(このようなものを円錐振り子という)。 糸の長さをL,糸と鉛直線とのなす角を0として,次 の問いに答えよ。ただし,重力加速度の大きさをg, 円周率をとする。 (1) 糸がおもりを引く力の大きさSはいくらか。 (2) 等速円運動の周期Tはいくらか。 指針 して円の中心方向の運動方程式をつくる。 解 (1) 図のように,おもりにはたらく力を円の中心方向 (水平方向) と, それと垂 の2カ 直な鉛直方向に分解して考える。糸がおもりを引く力と重力 の鉛直方向の成分はつり合っているから, 鉛直上向きを正として Scost-mg=0 向心力としてはたらく力を考え,これに着目 ….... ① (2) 3mgとの合力は円の中心を向いており, おも りが等速円運動をするための向心力となっている。 この合力の大きさはこの水平方向の成分 Ssine に 等しい。 これより, 等速円運動の運動方程式は,円 運動の半径を , 角速度をωとして, mrw²=Ssine ...... ② また, r = Lsin0 となるので,これと式 ①, ② より よって, w= 答 (1)S= よって, S= w²== g Lcos したがって,T= mg cose mg coso 2π W (2) T=271 Lcose g n~/ L cos0 g g Lcose Š 0 Ssine m Scost m omg

書いてある所はあっているか、書いていないところは答えを教えていただきたいです。

Drills Put the words in the correct order to complete the sentences. Fact A 1. I enjoy [ in / online games / my free time / playing ]. playing online games 私は暇な時間にオンラインゲームをするのを楽しんでいます。 in my free time 2. My bad habit is [ sweets / eating / between meals / a lot of ]. 私の悪い習慣はたくさんのお菓子を間食することです。 3. [ eating / meals / is / well-balanced ] good for your health. バランスのとれた食事をとることは健康にいい。 4. My mother is thinking [ her health / of / yoga / for / starting ]. of starting yoga for 私の母は健康のためにヨガを始めようかと考えています。 her health 2 Change the word in the brackets to the appropriate form and complete the ma sentences. Fact B 1. I have decided to go 2. I think you should avoid [drink] eating a lot of sweets between meals on a diet to lose weight. [go] 3. My father followed his doctor's advice and gave up 4. I will stop 5. I will never forget Please don't forget running to take soft drinks. They contain a lot of sugar. smoking. [smoke] escalators. Instead, I'll use stairs. [use] in the Mount Fuji Marathon last fall. [run] this medicine twice a day. [take] W Josipa Unit O Unit Unit Z Unit 3 Unit 4

この問題で間違ってる箇所があれば指摘していただきたいです。 よろしくお願いします。

Part 6: Text Completion Questions 1-3 refer to the following letter.ulloh September 5, 2007 Mr. David Baker Baker Industry 9560 Wilshire Boulevard Beverly Hills, CA 90212-2427 Dear Mr. Baker: I am to introduce to you Mr. Toshio Suzuki, the manager of the Planning balne 1. (A) please (B) pleased (C) pleasing (D) pleases Department at Sunrise Company, Ltd. He is planning to visit Los Angeles to study the possibility of starting a new business in the United States and wishes to call on you advice and information. He is scheduled to arrive in 2. (A) for (B) on (C) in (D) at Los Angeles during the week of November 20. Any advice that you could give him to make his visit would be very much appreciated. 3. (A) escaping (B) losing (C) relating (D) rewarding Sincerely, Yoshiaki Masuda, President

この問題はなんで③とかはダメなんですか？解説をお願いします。解答にはpermanentが正社員という意味だからと書いてあったんですけど、永続的なってとらえたら③も同じ意味だと思うんですけど、、よろしくお願いします🙇🏻‍♀️

9 She is seeking a continuous () position in an accounting firm in an urban area. 2 permanent 3 a lasting a anique an endless

お願いします、

( Crossword Puzzle Complete the puzzle and make a word. 001 下の英文が表す単語, あるいは に入る語を用いて クロスワードパズルを完成させ,その後,★のマスの アルファベット9文字を用いて,次の英文が表す単語 を作りなさい。 This animal has a long tail, big jaw and lives in [2] rivers and lakes. Their skin is used for bags or skil is used 101 nowshoes. Jo 12 bas ensmad wod \1) am to bohay gol 3 THES Dowans di 151 prb vino co 5 I 15 11 100,210 this. od 11 A part of a house that has walls and sli bay a floor. bas pror diod ni s13 This is the most common metal on earth. 15 "It's very cloudy. It is il toto soon." 15 10 Aplama L ★ bn hottest. 2 si ni Todo dons is dool egob ba her at the airport yesterday. ni 500 aroels Jud 7 People do this moving their body Daxil ved Ternays paisubnox while listening to music. rod nem 9 You can boil this fusic to gold A 2 19 metal on 12 To tra ★ nom sdi odio ross is name M E OF 13 6 7 E ★ E 12 sergs odi 20170 albbi[ACROSS ]da albbus" & ballo so edure [ DOWN] of guidismos sved of amese boold 10 A small shape of a rock. This is o 1 One of the four seasons, and the poved used to make concrete. alqm MOT 3 Water becomes this when it is very cold. ★ C /10 You write or draw on this collection of sheets of paper. an name of a small insect. T 14 4 This is the place where something invom to rain 14 The opposite of "far." Sha A ends. And bas swrangleid jest oT 0: A musical entertainment given in ni ripolyro lo introms bonin public by one or more performers. 6 8 An animal or bird you keep at home, gob Sp Hon such as a dog, cat, and rabbit. dogs to 10 The opposite of "out." form Close onships travel by airplane. This ada bavol ans. is also a his is also a bib ada

この問題の答えはDなんですけど、なぜそうなるのか分からないので教えて頂きたいです。 他の選択肢が間違っている理由まで教えて下さると助かります！

If your purse is missing, you may (A) be losing (B) lose it. (C) be lost (D)) have lost

エレメント2のレッスン6のComprehensionとVocabularyの答え教えてください

96 Comprehension Life 2. Bruce Edwards changed A Reading for main ideas: Choose the best answer. 1. What is the main idea of the passage? a The development of the role of caddies. bThe fighting spirit necessary for athletes. The friendship between a golfer and a caddy. B Reading for details: Fill in the blanks with the words in the box below. There a unnecessary words. Then divide the paragraphs into the following sections. 11 9 3 4 5 16 Caddy for Life 1 2 8 10 a the way people saw caddies b his career from a golfer to a caddy golf courses so that golfers could play safely There was a very (1. ) caddy called Bruce Edwards. ) from high school, he started to work for Tom Watson as a Caddies used to just carry the golf bag for golfers, but Bruce always (3. After Bruce (2. condition of the course. Bruce was also not afraid to (4. ) with the golfer. ), Watson wanted to play less, so Bruce decided to work for Greg After many (5. Bruce missed Watson, and he decided to return to Watson after three years ( After they started to play together again, Bruce began to have some (7. Bruce was (8. ) with ALS, but he continued to caddy for Watson. ) at the US Open. Introduction Becoming Watson's caddy ( Separation and reunion Deadly diagnosis ( The last chance together in the spotlight ( Epilogue ) ) ) Vocabulary A Choose the correct definition 1. What's the distance from 2. I'm glad we have this opp 3. It was heartbreaking to 4. My aunt was taken to hos 5. His name now became a making you (b) the amount an unimpo d a chance to relating to C Listening for details: Listen to the statements and answer T(true) or F(false). 1.( ) 2. ( ) 3. ( ) 5. ( ) 4. ( Both Watson and Bruce (9. 2. Could you move over Watson and Bruce knew this could be their last time together in the (10. Could you move ou Watson asked for (11. ) to do more research on ALS, and Bruce w 3. They sat down and t ) for having someone like Watson with him. (12. They sat down an Paragraph Organization ) B Choose the correct word for 1. She strongly (disagree 2. Is there a (direct / dir Words diagnosed / disagree / exam funding/special/sorro separation /health/spoti thankful/graduated victories / weaker/appea D Retelling the story: Look at the pictures on pages 92-93, and retell the story. 3. He was (desperate / d- C Fill in the blanks to rephra 1. The teacher is now co- The teacher is now - 4. If you really want th If you really want 5. He finally admitted He finally ( - Tips caddy caddy は caddie と綴られる for a golfer)」を意味するとと caddy for a golfer)」 という意 として使えるかどうかをまず推

解き方がわかりません。教えてください

になる数を求めよ。 ⑤ 18 +8√2 の小数部分をaとするとき, ' +2a OSI の値を求めよ。 1. ねそ

これに当てはまる英単語を教えてください！

英文を読み、問いに答えなさい。 Anne Frank was a cheerful curious Jewish girl. She liked chatting with her friends. On her 13th birthday, she received a nice diary from her father. The Nazis were persecuting Jewish people. Her family's life became harder than before and she had to stay in a hiding place. ( ) she continued to write her diary and her positive attitude encourages people even today. ( )に当てはまる語としてふさわしいもの を選びなさい。 O Because O In spite of O So O However