物理の問題です。 解説していただけると嬉しいです。

3 自然長が10cm の軽いばねがある。 このばねに質量40gのおもりをつるして静止させると、ばねの 長さは12cmになった。 このばねを2本用意して、 図のように摩擦のある水平面上に質量80gの物体 を置き、物体の左右にばねをつけ、 右のばねには40gのおもりを、左のばねには質量不明のおもりを つるすと、物体は静止した。 このとき、2本のばねは水平で、 左のばねの長さは16cmであった。この ときの右のばねの長さと、 物体にはたらく摩擦力の大きさと向きはどうなっているか。 適当な組合せを 一つ選び、番号で答えよ。 ただし、 質量100gのおもりにはたらく重力の大きさを1Nとし、ばね及 びばねの先にあるひもの質量は考えなくてよいものとし、 摩擦のある水平面と物体の間にはたらく摩擦 以外の摩擦は考えないものとする。 [解答マス番号 24 ] 2 右のばねの 長さ 12cm 1 2 3 4 5 6 7 8 12cm 12cm 12cm 16cm 16cm 16cm 16cm 物体にはたらく 摩擦力の大きさ 0.4N 0.4N 0.8N 0.8N 0.4N 0.4N 0.8N 0.8N 物体にはたらく 摩擦力の向き 右 左 右 左 右左右左 (16) おもり 物体80g wwwwwwwww 摩擦のある水平面 左のばね do,12 右のばね おもり 40g

144.1.2 記述はこれでも大丈夫ですか？？

とも1つの円 に着目 +2a=0& すると 2=a(x-l 放物線 リニュ -2) の共有 ≦x≦1の 考えてもより を参照。 YA 重要例題144 三角方程式の解の個数 Capry aは定数とする。0に関する方程式 sin' 0-cos0+α=0 について,次の問いに答 えよ。ただし, 0≦02とする。 00 [[大 (1) この方程式が解をもつためのαの条件を求めよ。 (2) この方程式の解の個数をαの値の範囲によって調べよ。 指針 cos0=xとおいて, 方程式を整理すると 前ページと同じように考えてもよいが、処理が煩雑に感じられる。 そこで、 x2+x-1-a=0 (-1≦x≦1) ① 定数αの入った方程式f(x)=αの形に直してから処理に従い,定数aを右 大辺に移項したx2+x-1=αの形で扱うと、関数y=x2+x-1(-1≦x≦1) のグラフと直 線y=a の共有点の問題に帰着できる。 DET. www.e ] → 直線y=a を平行移動して, グラフとの共有点を調べる。 なお, (2) では 方程式は したがって 解答 cos0=xとおくと、0≦0<2πから (1-x2)-x+α=0 x2+x-1=a f(x)=x2+x-1 とすると f(x)=(x+ (1) 求める条件は、-1≦x≦1の範囲で、関数 y=f(x) の グラフと直線y=α が共有点をもつ条件と同じである。 5 よって、 右の図から ･≦a≦1 (2) 関数 y=f(x)のグラフと直線y=α の共有点を考えて、 求める解の個数は次のようになる。 [3] x=-1, 1であるxに対して0はそれぞれ1個, -1<x<1であるに対して0は2個あることに注意する。 5 [2] a=-- 5 4 5 4' — 練習 144 A [1] a<-- 1 <a のとき共有点はないから 0個 のとき, x=-- <a <1のとき -1exelt 2 2 から 2個 5 4 -1<x<--<x- れぞれ1個ずつあるから 4個 [4] α=-1のとき, x=-1, 0 から 3個 <x<0 の範囲に共有点はそ [6] [5] [4] この解法の特長は、放物線を 固定して, 考えることができ るところにある。 [3]→ 友量[2]- [6]→ [5]- [4]~ [2]+ [4]→ グラフをかくため基本形に。 y=f(x) 1 重要 143 XA iO |1 TIR» 1 2 YA 1 [5] -1<a<1のとき,0<x<1の範囲に共有点は1個あるから 2個 +35850 08 [6] α=1のとき, x=1から1個 2π 225 [3] 2001 0に関する方程式 2cos2Q-sin0-a-1=0の解の個数を,定数aの値の範囲に p.226 EX90,91 ただし。 0≦0<2πとする｡ 4章 23 三角関数の応用

硫酸銅水和物は何結合になりますか？

割合を考えて、その理由を教えてください！！

活動 適切な発電構成割合について考えよう 図4は、各発電方法の使用割合を1日の時間経過で示した ものです。 p.144~p.145の図 2 を見て,発電方法のプラ ス面、マイナス面を比較しながら,これからはどのような発 電割合で電力を賄っていけばよいか,自分なりの考えをまと めましょう。 図 4 1日の電気の使われ方と電源の組み合わせの例 電力 ピーク電源 コスト高 出力調整容易 ミドル電源 コスト中 出力調整可能 ベースロード電源 コスト低 出力が一定 4 8 太陽光, 風力 石油火力 揚水式水力など 天然ガス火力 LPガス火力など 原子力 石炭火力 一般水力 地熱 12 16 20 24 時間 日本原子力文化財団 「原子力・エネルギー図面集」より作成 どのような発電方法を 組み合わせて発電するかを考える のと同時に、エネルギー消費量 ◎○ をどうやって減らすかを 考えることも大切だよ。 12 sta 技術の天びん 私が考えた発電構成割合 各発電方法の使用割合をどう したいか考えましょう。 24

解説お願いします😿😿

discovered resembled called Sealand. establishing rights faced status Many people change countries during their life, but one man has (1) (2) by Roy's grief the rest of son and (10) heir took over in the sea to contain (3) that would be used to fight off invaders. After the war, the soldiers left these platforms and they were forgotten - until 1967. In that year, a British man, Roy Bates, one of the platforms and announced he had started his own country, This surprised people in the UK, who believed they had the (5) . Bates and (6) to leave the platform. However, Roy (8)_ himself by his own country. During World War II, the UK built a number of artificial platforms made a name for weapons to the platform. orders In 1968, a court decided that the UK had no power over Sealand. Just like other places with the that the platform was in international waters. of a country, Sealand, has its own stamps, coins, and passports. It is controlled 'Prince' Michael, and is home to a large Internet business. the people on the island (his family), (7) 6 15

三角貿易が開始されてどこの国がどこの国にアヘンを密輸していたのですか？イギリスが清へ、かインドから清へかよく分かりません

教えて下さると嬉しいです( •̥-•̥ )

A. Circle the correct answer for each question. likely to be jealous of someone. 1. You are more 2. Which do many people decorate at Christmas time? 3. Which are people more accustomed to? a. rich a. a feast b. a tree a. spending money b. receiving awards a. an empire b. a rifle a. an insect b. water a. help it b. ruin it 6. What would profit do for a business? a. excited b. confused 7. Which would people rather be? a. a contract b. a feast 8. Which would you invite friends to share with you? a. a recruit b. a contract 9. Which would you sign? a. being punished b. getting a reward 10. Which would few people enjoy? B. Complete the paragraph with items from the box. Two items are extra. Which of these is a weapon? 4. 5. Which of these flows? discovered resembled establishing rights faced status by Roy's s grief the rest of Many people change countries during their life, but one man has (1) (2) son and (10) heir took over This surprised people in the UK, who believed they had the (5) . Bates and (6) to leave the platform. However, Roy (8). in the sea to contain (3) that would be used to fight off invaders. After the war, the soldiers left these platforms and they were forgotten - until 1967. In that year, a British man, Roy Bates, one of the platforms and announced he had started his own country, (4) called Sealand. b. poor himself by his own country. During World War II, the UK built a number of artificial platforms made a name for weapons the people on the island (his family), (7) In 1968, a court decided that the UK had no power over Sealand. Just like other places with the that the platform was in international waters. to the platform. orders of a country, Sealand, has its own stamps, coins, and passports. It is controlled 'Prince' Michael, and is home to a large Internet business. 11 15 69

よくわからないので解き方を教えてください

たしかめ △ABC~△DEF で, その相似比が3:7のとき, △ABC と W △DEFの面積の比を答えなさい。 例1相似比が54の相似な2つの図形P,Qがある。 図形P の面積が150 cm²のとき、 図形Q の面積を x cm² とすると､xの値を求めなさい。 X

教えて下さると嬉しいです(><)

Circle the correct answer for each question. A. likely to be jealous of someone 1. You are more 2. Which do many people decorate at Christmas time? 3. Which are people more accustomed to? 4. Which of these is a weapon? 5. Which of these flows? a. rich b. poor a. a feast b. a tree a. spending money b. receiving awards b. a rifle b. water b. ruin it b. confused b. a feast b. a contract a. a recruit a. being punished b. getting a reward B. Complete the paragraph with items from the box. Two items are extra. 6. What would profit do for a business? 7. Which would people rather be? 8. Which would you invite friends to share with you? 9. Which would you sign? 10. Which would few people enjoy? discovered resembled establishing rights faced status a. an empire a. an insect a. help it a. excited a. a contract grief the rest of (9) by Roy's son and (10) heir took over Many people change countries during their life, but one man has (1) (2) himself by his own country. During World War II, the UK built a number of artificial platforms in the sea to contain (3) that would be used to fight off invaders. After the war, the soldiers left these platforms and they were forgotten - until 1967. In that year, a British man, Roy Bates, (4) one of the platforms and announced he had started his own country, called Sealand. This surprised people in the UK, who believed they had the (5) - Bates and (6) to leave the platform. However, Roy (8). made a name for weapons to the platform. orders In 1968, a court decided that the UK had no power over Sealand. Just like other places with the that the platform was in international waters. of a country, Sealand, has its own stamps, coins, and passports. It is controlled 'Prince' Michael, and is home to a large Internet business. the people on the island (his family), (7) in 11 - 15 69

教えて下さると嬉しいです(><)(><)

A. Circle the correct answer for each question. likely to be jealous of someone 1. You are more 2. Which do many people decorate at Christmas time? 3. Which are people more accustomed to? a. rich a. a feast b. a tree a. spending money b. receiving awards a. an empire b. a rifle a. an insect b. water a. help it b. ruin it a. excited b. confused a. a contract b. a feast a. a recruit b. a contract a. being punished b. getting a reward B. Complete the paragraph with items from the box. Two items are extra. 4. Which of these is a weapon? 5. Which of these flows? 6. What would profit do for a business? 7. Which would people rather be? 8. Which would you invite friends to share with you? 9. Which would you sign? 10. Which would few people enjoy? discovered resembled establishing rights called Sealand. faced status - Many people change countries during their life, but one man has (1) (2). This surprised people in the Bates and (6) to leave the platform. However, Roy (8). (9) by Roy's son and (10) grief the rest of heir took over in the sea to contain (3) that would be used to fight off invaders. After the war, the soldiers left these platforms and they were forgotten - until 1967. In that year, a British man, Roy Bates, one of the platforms and announced he had started his own country, b. poor himself by his own country. During World War II, the UK built a number of artificial platforms made a name for weapons who believed they had the (5) the people on the island (his family), (7) to the platform. orders In 1968, a court decided that the UK had no power over Sealand. Just like other places with the that the platform was in international waters. of a country, Sealand, has its own stamps, coins, and passports. It is controlled 'Prince' Michael, and is home to a large Internet business. in 11-15