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English Senior High

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Solved Answers: 1
Physics Undergraduate

なぜこのように変換されるのか説明してもらいたいです!

には、惑星は楕円軌道を描いて運動している。 万有引力を受けて運動する このような惑星の運動を考えるには, 2次元極座標を用いるのが便利であ る。そこで,2次元極座標を用いると,質点の速度と加速度がどのように 表され、運動方程式がどんな形に表されるのかを、考えてみよう。 r-y 直交座標系で位置 (x,y)において速度v=(ひょ,ひy)=(エン)をも って運動している質点P を考える。 図 8.2に示 すように, 2次元極座標系での速度成分 (Ur, Up) ~ と -y 直交座標系での速度成分 (vs, vy) の間に は,第6章で考えた回転座標系の場合と同様に, Ur= vxCOS+vy sin y ひ y HP (8.5) r v=vxsin +vy cosp I の関係が成り立つ。 図8.2 速度の極座標表示 質点Pの位置は,(x,y)=(rcos, rsin) と書けるが,Pが運動し の関数であるから, 合成関数の微分により速 は時刻 ているとき 度成分 (x, y) は, v=i=icosp-rsin (8.6) vy=y=isinp+rocos p と書ける。これを (85) 式へ代入して、速度の極座標表示 10r=j (8.7) V₁ = 14 を得る。 この結果は、上のような計算をせずに理解す ることができる。 図 8.3のように, 速度vの動 成分は,動径の増加する割合であり, vr =と書ける。 次に v は,動径に垂直な速度 成分であり, 原点を中心とした一定の半径r の円周に沿った速さである。 したがって, ve は半径r, 中心角の扇形の弧の長さの 増加する割合であり,v=at d ro 図8.3 極座標での速度成分 (x)=r(rは一定)と書ける。また、 は円運動の角速度であるから,v=r=rw は,円運動している質点 118

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English Senior High

1枚目の写真のTask1を参考に Task2でメールの返信を考える問題です🙇‍♀️ 2枚目に私が書いたものがあるので文法や単語ミスがないか添削してほしいです 3枚目に評価する時に先生がよく見てるところを貼ってるので参考にしていただけると幸いです すみませんがよろしくお願いし... Read More

Task 1 Read the ad below. Underline the qualities that Jenna is looking for in a roommate. NEED A RESPONSIBLE ROOMMATE I'm a 20-year old female history student at CUNY. I'm looking for a tidy and friendly roommate to share a two-bedroom apartment near the university. The apartment has furniture, Internet, and cable TV. We'll share a bathroom and a living room. The available bedroom is large. The rent is $300 a month. The perfect roommate would also be a student. I have a small dog, so you have to like dogs. I also can't take any other pets. If you are a smoker, you MUST smoke on the balcony. I get along well with creative and knowledgeable people. I'm pretty talkative and would be happy to live with a similar person. Please send me an e-mail (jennabusybee@cunyemail.edu) and tell me about yourself. I would like to hear about your studies, personality, and why you would make a good roommate. Jenna Task 2 (00 Write an e-mail to Jenna (80-120 words). Tell her about yourself. The phrases below may help. responsible tidy knowageable pay the rent on time/clean up after myself all the time / know a lot of things / like to have a good conversation/your own description カンバセイション Creative, friendly TITELK

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English Senior High

1枚目の写真のTask1を参考に Task2でメールの返信を考える問題です🙇‍♀️ 2枚目に私が書いたものがあるので文法や単語ミスがないか添削してほしいです 3枚目に評価する時に先生がよく見てるところを貼ってるので参考にしていただけると幸いです すみませんがよろしくお願いし... Read More

1 トレーナー 広告 You are a trainer. Read the ad and think about how you can help Dan. Write some notes on the right. WANTED: Personal Trainer I'm looking for someone to help me lose weight. I also want to get back (46) in shape again, I'm so busy that I can't make time for exercise. I haven't exercised in a few years and I'm really packing on the pounds. I need somebody to motivate me. Do you have any advice? The job is part-time, three days a week. You can contact me by e-mail at dan@sterlingarcher.com. I'm looking forward to hearing from you! Dan I Why are you the best? I've been a trainer for 5 years and am familiar with diets. How will you change his diet and exercise program? e eat food that are high in protein. • walk (0 minutes every day on an empty stomach Avoid fried food eat something that fills you up 腹もらいいもの Task 2 Reply to Dan's ad (80-120 words). Include some of the words and phrases below. concentrate on nutrition / go on a diet / low in fat / small portions / current weight / get daily exercise/ work out at home/accompany / take a run in the park

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