Grade

Type of questions

Physics Senior High

万有引力の問題です。 (7)の解き方がわかりません。 答えは√3GM/2Rです。 どなたか教えてください🙏

第5問 解答欄注意 半径R, 質量Mの地球から 地球の中心から距離 3Rの円軌道 に質量mの人工衛星を2段階の操作で打ち上げる。 まず,地球 を1つの焦点とし,点 Pで地表に, 点Qで半径3Rの円軌道に接 する楕円軌道にのせ、 次に、点Qで円軌道に移行させる。点P, Qにおける人工衛星の速さをそれぞれ up, bQ, 万有引力定数をG, 円周率をπ,万有引力による位置エネルギーの基準を無限遠とす る。 v=- G M (1) 点Pにおける人工衛星の運動エネルギーをmup を用いて表せ。 1/2mv (2) 点Pにおける人工衛星の万有引力による位置エネルギーをR,M,m,Gを用いて表せ。 3.R (3) 点Pにおける人工衛星の面積速度を R, up を用いて表せ。 (4) 点Qにおける人工衛星の運動エネルギーをmv を用いて表せ。 5点Qにおける人工衛星の万有引力による位置エネルギーをR,M,m, G を用いて表せ。 6) 点Q における人工衛星の面積速度を R, vQ を用いて表せ。 (7) ( 7 up を R, M, G を用いて表せ。 て Po 8) 地球の中心からの距離 3R の円軌道上を運動する人工衛星の速さv3 をR,M,G を用いて 表せ。ただし,答えだけでなくその導出過程や考え方なども簡潔に記すこと。 (9) 点Pから点Qまで移動するのにかかる時間を R,M,G,π を用いて表せ。

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English Junior High

英検対策の問題です。中1なのですか分からないとこばっかりで…。解説も出来れば、出来ればでいいのでお願いします🙇‍♀️⤵️

次のEメールの内容に関して (28) から (30) までの質問に対する答えとして最 582 SA 4[B] [も適切なものを 1,2,3,4の中から一つ選び、その番号のマークをぬりつぶしな さい。 From: Lynn Mills To: Cathy Leonard Date: June 28, 2011 18:39 Subject: Changing the schedule Dear Cathy, How are you? I just checked my schedule for next month. There is a problem. I asked you to babysit* Luke and Kevin on July 16th, but my meeting is on Saturday, July 23rd. Can you come that day instead? The time is the same. I'll leave the house at ten in the morning and be home by four. I also wanted to ask you about lunch. Could you make lunch for the boys again? They really loved the spaghetti you made for them last time. If you don't have time to cook, I can leave some sandwiches for you and the boys. If there's something you need for lunch, I'll go shopping for it on Friday. Please e-mail me soon about the new date. I hope it's OK for you. You're Luke and Kevin's favorite babysitter. Thanks, Lynn Mills From: Cathy Leonard To: Lynn Mills Date: June 28, 2011 20:12 Subject: No problem Dear Mrs. Mills, Thank you for your e-mail. I don't have any plans on the 23rd, so I can change the date for babysitting. My grandparents will visit us on the weekend of the 16th. I'm glad because now I'll have more time to spend with them. About lunch, I would like to make pizza and salad this time. I hope Luke and Kevin can help me with the cooking. I think it'll be fun. I'm looking forward to playing with the boys again. Say hello to them! Nee you next month, Cathy Babysit: 子守りをする (28) What will Mrs. Mills do on July 23rd? 1 Go to a meeting. 2 Go shopping. 3 Take a trip. 4 Have a cooking lesson. (29) Why is Cathy glad? 1 She will be able to work on both weekends. 2 She will have more time to see her grandparents. 3 She won't need to wake up early. 4 She won't have to make lunch. (30) What does Cathy say about lunch? 1 She wants Mrs. Mills to leave some money. 2 She will make Luke and Kevin's favorite food. 3 She thinks it will be fun to cook with Luke and Kevin. 4 She wants to take Mrs. Mills to a restaurant. 21年度第1回

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