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英語 高校生

この長文の①に入る単語を選ぶ問題で自分はエが1番自然だと思うのですが、不安なのでどなたか教えてくださるとありがたいです。

特殊構文 文法項目 fireworks remain an important part of celebrations in China. In particular, you are ' Fireworks were invented by the Chinese in the seventh century. To this day, C) Houses of Parliament (the meeting place of the British government) with enough 一*gunpowder to destroy the building and kill everyone inside it, including the king In the United Kingdom, fireworks are usually only seen in the first week of November each year. On November fifth, 1605, g Guy Fawkes was caught under *the テーマ 文明·風俗 UNIT 13 O Track 78-80 Reading almost certain to see fireworks during the Spring Festival, otherwise known . Chinese New Year. ©only in the past several centuries, however, ( ① 5 custom of viewing fireworks spread to countries all over the world. For the Japanese, fireworks are commonly viewed in the summer. In fact. on on.. given day of the summer season, you are likely to find a publically organized fireworks display somewhere in Japan. Many people wear traditional summer kimonos or yukata, and enjoy foods and sweets bought from *open-air stalls while watching the 10 fireworks in the night sky. The first fireworks were seen in Japan in 1733. Currently, the biggest fireworks display in Japan is held in Nagano prefecture, where about 39,000 explosions light up the sky. In America, fireworks are closely associated with two important annual events. 79 The first of these events is New Year's Eve. As the clock strikes midnight and 5 people welcome the New Year, fireworks light up the sky, which lets everyone know that the New Year has begun. The fireworks in *Times Square, New York are especially famous and live on TV across the nation. The second event is the Fourth of July, commonly known as *Independence Day. On this day, all Americans celebrate their freedom from the *British Empire and the birth of their country. Moo。 of the fireworks on this night are red, white, and blue in color iust like the flag o! b American's country. aningtai 3 Every year, around November fifth, people on fireworks shows to acroga

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物理 高校生

(1)で波線の部分が、なぜlcosθなのか教えてください🙏🙏 私は l なのかと思ってしまいました、、、

発展例題10 摩擦のある斜面上の運動 三角比 発展問題 151, 155 図のように,水平とのなす角が0の斜面の下端に,質量mの物体を置き,斜面に沿っ て上向きに初速度 vを与えた。斜面と物体との間の動摩擦係数をμ',重力加速度の大 きさをgとして,次の各問に答えよ。 (1) 物体が斜面を上がって最高点に達するまでに,斜 面上を移動した距離/を Vo, g, μ', 0で表せ。 (2) 物体は最高点に達したのち,斜面をすべりおりる。 下端に達したときの速さひをvo, μ', 0で表せ。 m 指針 物体は,運動の向きと逆向きに動摩 1 mv3=-μ'mglcosé 擦力を受けており, その仕事の分だけ力学的エネ ルギーが減少する。最高点では速さが0となる。 解説(1)物体がすべり上がるときに受 ける力は, 図のようになる。動摩擦力の大きさ は, μ'mgcos0であ り,最高点に達した ときの力学的エネル ギーの変化は, 動摩 2 1=- 2g(sin0+μ'cos0) (2) 斜面の下端に達したときの力学的エネルギ 0ーの変化は,往復する間に動摩擦力がする仕事 に等しい。 mgcos0 mg sin0 mパーニmug=-2がmgl.cos0 1 1 -mv?=-2μ'mglcos0 mgcos0 擦力がした仕事に等 しい。 sin0-μ'cos0 Vo sin0+μ'cos0 mg (1)の1を代入して, ひ=,

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