問題を解いたのですが答えが分かりません😭 教えてください！

Part 7 生まれたばかりの赤ちゃんは何もできない,というのは本当でしょうか。 People used to 1 Babies are full of mysteries. think they could do nothing by themselves except breathe, eat and sleep. These days, however, new discoveries about babies show us that they have much greater abilities than most people think. 1B 2 Recent research findings in brain science and cognitive psychology make it clear that babies are not necessarily born with clean slates. For example, they remember some sounds which they heard in the mother's womb. Sounds in the womb are usually muffled, but the melody and rhythm of musical sounds are not much altered. 3 Surprisingly, babies sometimes can naturally do what adults think babies cannot do. Do you believe that babies are born with the ability to hold their 15 breath in the water and swim? Some researchers studying the dive reflex in 21 infants between four and twelve months old found that none of them inhaled water or choked 20 during "diving." They naturally moved their Baby clean ciates 白紙の状態で 15 hold one's breath 後間もなくから1歳くらいになるまでの赤ちゃん 5 10 arms and legs in a swimming motion. discoveries [diskávəriz) <discovery [diskávəri] finding(s) [fáindiŋ(z)] brain [bréin] cognitive [kágnətiv] psychology [saikálǝdzi] slate(s) (sléit(s) womb (wú:m] 17 dive reflex muffle(d) [máfl(d)] rhythm (ríom alter(ed) [5:ltər(d)] surprisingly [sərpráizinli] naturally [nætfərəli] breath [bré0] researcher(s) [riss:rtfər(z)] Co reflex [rí:fleks] infant(s) [infənt(s)] inhale(d) [inhéil(d)] choke(d) [tfóuk (t)] C motion (mouf

問題を解いたのですが答えが分かりません😭 教えてください！

Part 7 生まれたばかりの赤ちゃんは何もできない,というのは本当でしょうか。 People used to 1 Babies are full of mysteries. think they could do nothing by themselves except breathe, eat and sleep. These days, however, new discoveries about babies show us that they have much greater abilities than most people think. 1B 2 Recent research findings in brain science and cognitive psychology make it clear that babies are not necessarily born with clean slates. For example, they remember some sounds which they heard in the mother's womb. Sounds in the womb are usually muffled, but the melody and rhythm of musical sounds are not much altered. 3 Surprisingly, babies sometimes can naturally do what adults think babies cannot do. Do you believe that babies are born with the ability to hold their 15 breath in the water and swim? Some researchers studying the dive reflex in 21 infants between four and twelve months old found that none of them inhaled water or choked 20 during "diving." They naturally moved their Baby clean ciates 白紙の状態で 15 hold one's breath 後間もなくから1歳くらいになるまでの赤ちゃん 5 10 arms and legs in a swimming motion. discoveries [diskávəriz) <discovery [diskávəri] finding(s) [fáindiŋ(z)] brain [bréin] cognitive [kágnətiv] psychology [saikálǝdzi] slate(s) (sléit(s) womb (wú:m] 17 dive reflex muffle(d) [máfl(d)] rhythm (ríom alter(ed) [5:ltər(d)] surprisingly [sərpráizinli] naturally [nætfərəli] breath [bré0] researcher(s) [riss:rtfər(z)] Co reflex [rí:fleks] infant(s) [infənt(s)] inhale(d) [inhéil(d)] choke(d) [tfóuk (t)] C motion (mouf

（3）がなぜcos120°になるのでしょうか cos30°ではダメなのですか？

基本例題15 図のような, 水平となす角が30°のなめらかな斜面 AC がある。 質量 40kgの物体を斜面上でゆっくりと大 AからCまで引き上げた。 重力加速度の大きさを 9.8 m/s2 として,次の各問に答えよ。 (1) 物体を引き上げる力Fの大きさは何Nか。 (2) 力Fがした仕事は何Jか。 (3) 物体にはたらく重力がした仕事は何Jか。 指針 (1) 「ゆっくりと引き上げた」とは, 力がつりあったままの状態で, 物体を引き上げ たことを意味する。 斜面に平行な方向の力のつ りあいの式を立て, F の大きさを求める。 (2)(3) W=Fscose を用いる。 解説 (1) 物体にはたらく力は、図のよ うになる。 斜面に平行な方向の力のつりあいか ら、 F=mgsin30° =40×9.8× 仕事 1 2 = 1.96×102N 2.0×10² N N mgsin30° 130° mg mgcos30° 30° 5. 力学的エネルギー 65 A 130° 10m |基本問題 131 =-1.96×10°J C B (2) 物体は,力Fの向きに10m移動しているの で、仕事Wは, W=(1.96×102) ×10=1.96×10°J 2.0×10'J (3) 重力物体が移動する向きとのなす角は 120°である。 重力がする仕事 W' は, W'=(40×9.8) ×10×cos120° -2.0×10°J 別解 (3) 重力は保存力であり, その仕 事は,重力による位置エネルギーの差から求め られる。 点Aを高さの基準とすると,点Cの高 さは10sin30°=5.0mであり, 仕事 W' は, W'=0-mgh=0-40×9.8×5.0 =-1.96×10 J 2.0×10°J 第Ⅱ章 エネルギー

(2) なぜX＝l Sinθといえるのかわりません

79. 単振り子 図のように,長さの軽い糸に,大きさの無視で きる質量mのおもりをつけて振動させる。 おもりの最下点を原点O とし, 水平方向右向きにx軸をとり,重力加速度の大きさをg とする。 (1) 糸が鉛直線と角をなすとき, おもりにはたらく力の, 円の接線方 向の成分Fをm, g, 0 を用いて表せ(F, 0 はともに反時計回りを 正とする)｡ 0 X Xx (2) 力Fをm, l, g, x を用いて表せ。 0 (3) 振れが小さい場合, 力Fは水平方向にはたらくとみなせる。このとき.Fが復元力 となり, おもりは単振動をする。振動の周期Tを求めよ。 (4) この実験を上向きの加速度αで上昇するエレベーターの中で行うと, 周期 T'はいく らになるか。 81

波線のとこがなぜそうなるのかが分かりません

102 【力学的エネルギーの損失 ①】 図のような,なめらかな 斜面とそれに続く水平な面がある。 水平な面上の点B から先はあらい面になっている。 斜面上の高さんの 点Aから,質量mの物体を静かにすべらせた。 重力加速度の大きさをgとして,以下の問いに答えよ。 h B/////////// ← 1 (1) 物体が水平な面に達したときの速さを求めよ。 (2) 物体は点Bを通過後, 1だけすべって停止した。 この間物体にはたらく動摩擦力の大 きさを求めよ。 (3) 面と物体との間の動摩擦係数を求めよ。

分かる方お願いします

2 Choose the underlined part that is INCORRECT. (1) erit soori not like giving However, 3. (1) Almost people do not like giving a speech in front of a large audience. so ore 2sY: () the more they practice, the more confident they will become. 4 (2) Our new secretary is enough efficient for any manager to rely on. 1 2 some of their sense of taste )AMO slqze tedT ( as they be 4 as they become (東京農業大) Musilib yldiriat asw.maxs diem on () isoY: (4) Five_miles are too long a distance for me to walk. 9w flaiw I-( e o to o qa t'new il: A (近畿大) ③ (5) Most workers do not know how valuable they are to their company because they 1 nisys 19569) srit ase nas uc) (3) Researchers say people seem 1 oldest. 2 n to lose 2 are rarely never told so by their boss. Do (6) A host country for security measures to (7) So far as grammar is 1. the Olympics has to spend a significant amount of money - deal on possible terrorist threats. LLOY al mon 1: m concern, this sentence of yours is incorrect. ener JOVE avolsa od t'ass LOY LESSON a neb10 tag1100 (法政大) abrow Sprog ad al (): berl 8 on (愛知大)

Drill1の問１です。 If yuhei should not come ,we would start without him. このshould はwould となにが違うのですか？ どうしてshould だとわかるのか教えてください。

STEP 2 Drills 1 TARGET SENTENCES Training 2 本を見ながらシャドーイング 例文のページを開き、17の音声を追いかけるように音読しよう。[3回] Drill 1 R [ ]内の語のうち適切な方を選びなさい｡ 1. If Yuhei [would / should] not come, we would start without him. 2. If you [can/were to] open up a school, how would you operate it? 3. I suggest that you [will/should] do the laundry with the bath water. 4. In Japan it is necessary that you [will take / take] your shoes off when you enter a house. 5. My proposal is that this book [will be / be] treated like a textbook in schools Doperate: ~を運営する □do the laundry : 洗濯をする ☐proposal : Drill 21 ( )内の語(句)を適切な形に変えなさい。 1. To see him do magic tricks, you (will think he were a professional. 2. A capable lawyer (will win) the case. 3. One of my colleagues introduced the noodle shop to us; otherwise wew not notice it was a noodle shop. It looked like a private house. ロdo magic tricks : 手品をする ☐capahle ·EAKI que

the study of mathmatics was carried out many centuries before in other countries, like China. （数学の研究は、中国のような他の国々で何世紀も前に行われていた。） という文につい... Read More

教えてください！！

☐38. ( 39. That road is ( ) as she was, Rosamond had no choice but to agree to his offer. According 2 As well 3 Known 4 Reluctant ☐ 41. ( so dangerous that 3 very dangerous that 40. John was ( ) a good runner that we could not catch him. 4 very enough 2 so 3 such 1 So 42. Tell me your cellphone number ( in order to 2 in case 44. As ( □ 45. ( ) nobody wants to walk along it. ) was my anger that I lost control of myself. 2 Such 3 Very Ⓒlong □ 43. ( ) tomorrow, our soccer game will be called off. If it will rain 3 Whether it rains 2 such dangerous as 4 such dangerous that ) you have As far as 4 Great ) I can keep in touch with you. 3 so that 4 as if ) as my eyes can see, nothing can be seen but sand. 2 much 3 far 4 distant 2 Unless it rains 4 In case it rains to do something, you might as well enjoy doing it. 3 As soon as 4 As many as 2 As long as 112 < 松山大 > 113 〈大東文化大 > 113 < 東京理科大 > 113 <福岡大 > 114 <城西大 > 114 〈高知大〉 115 〈山梨学院大 > 115 <摂南大〉

解き方分からないので、教えてほしいです。

114点×2 右の図の立方体ABCD-EFGHにおいて、 辺CGの中 点をとする。 次のものを求めよ。 (1) AF, AM FMの長さ (2) AAFM EN (1) 三平方の定理よ AF-√ 444 = 2/2 H B F M