解説お願いします。

練習 複素数zの極形式を z=r(cos0+isine) とする。 このとき, -²の 12 極形式について,次のことを示せ。 -z=r{cos(0+t)+isin(0+n)}

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01 A: Do you have the time? B: ( ) A: Thank you Yes, it's 4 p.m. No, it's too late for that. 02 A Do you have a moment? } Are you sure you haven't? I'm not sure. When was it? I'm sure I can think of something. Sure. What's up? No, I'm busy now. Yes, I have a lot of time. 03 A: It's far too hot today! I've lost my appetite. B:(4) A: Sure, why not? DAre you on a diet? The spaghetti tastes great. D04 A: Good luck on the exam, John. ) Do you eat here often? Something cold to drink then? Thanks, Mary. I'll need it. Thanks, Mary. You're welcome. Yes, I know I won't let it happen again. No, it's OK. I can sit over here just as easily. 05 A: You don't have to be afraid of this gorilla. B: ( ) He looks really strong and dangerous! A: Don't be so upset. He's quite mild-tempered. Who cares! I told you sol 2 You can't be serious! You're right! □06 A: Could you give me some advice about the schedule of classes? B:(4) For the first year, you have to take the required courses. You can say that again. It's none of your business. It'd be my pleasure. Tomorrow would be better 07 A: Could you type this document again? B: ( A: That will be fine as long as it is on my deak by five today. Of course. I'm almost ready to go. 2 Sure, but can it wait until this afternoon? (MAYRI) Yes, but could you tell me what's wrong with it? Definitely. That will be a good idea (839-20

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EXERCISE A 空所に入れるのにもなさい。 D01 A: Thank you for giving me a ride back to town last night. B: Don't ( bet help mention 02 A: May I use your telephone? B(2) It's on the kitchen counter A: Thank you. DNever mind Too bad 03 A: I called Sarah at her office, but the line was ( B: What did you do, then? crowded 04 A: How are you? B:C You don't know how Tell me about it. 06 A: Thank you very much. B. The pleasure is ( mine 05 The general manager wasn't in, so I put the caller ( through near by to you □07 A-1 had a good time. Let's meet again soon. B Yes, let's. Please ( 3 tell 011 ( Be my guest. Please hang up. 2 on me 2 busy Ⓒoccupied Nice to meet you too. Couldn't be better. 10 A: Is the Hotel Richmond near here? Ime to your family. remember help 08 A: Hello, this is Ben Brown. Can I speak to Mr. White, please? B: Yes, Mr. Brown. Please ( catch grab ) the line for a second. hold Mind Mix ) your own business. 09 A: Could I have the tuna salad and a cup of coffee, please? B:(4) A: No, that's it, thanks Sure. Anything else? The tomato salad? ) to his secretary. up B: Yes, it's a huge hotel facing the square. You can't ( ) it. bet mention yours help miss Yes. Is that all you want? Would you like the coffee now? 2 Free take Escape (REAR)

「急募・英語」素晴らしい食事の経験 a great ( c _ _ _ _ _ _ _ ) experience-- 総務課 the General Affairs ( D _ _ _ _ _ _ _ _ _ ) サンプルを配布する ( p _ _ _ ) around s... Read More

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01 A: Do you have the time? ) A: Thank you Yes, it's 4 p.m. No, it's too late for that. 02 A: Do you have a moment? ) Are you sure you haven't? I'm not sure. When was it? I'm sure I can think of something. Sure. What's up? D03 A: It's far too hot today! I've lost my appetite. B:( ) 4 A: Sure, why not? Are you on a diet? The spaghetti tastes great. No, I'm busy now. Yes, I have a lot of time. 04A: Good luck on the exam, John. B: ( 3 Do you eat here often? Something cold to drink then? Thanks, Mary. I'll need it. Thanks, Mary. You're welcome. Yes, I know I won't let it happen again. No, it's OK. I can sit over here just as easily. 05 A: You don't have to be afraid of this gorilla. ) He looks really strong and dangerous! A: Don't be so upset. He's quite mild-tempered. DWho cares! You can't be serious! You're right! I told you sol 06 A Could you give me some advice about the schedule of classes? B:(4) For the first year, you have to take the required courses. You can say that again. It's none of your business. Tomorrow would be better. It'd be my pleasure. 07 A: Could you type this document again? B: ( ) A: That will be fine as long as it is on my deak by five today. Of course. I'm almost ready to go. Sure, but can it wait until this afternoon? Yes, but could you tell me what's wrong with it? Definitely. That will be a good idea. (3-9-3000

教えてください！！

EXERCISE A 空所に入れるのにもなさい。 D01 A: Thank you for giving me a ride back to town last night. B: Don't ( bet help mention 02 May I use your telephone? B(2) It's on the kitchen counter A: Thank you. DNever mind Too bad 03 A: I called Sarah at her office, but the line was ( B: What did you do, then? crowded full 04 A: How are you? B:C You don't know how Tell me about it. 06 A: Thank you very much. B. The pleasure is ( mine 05 The general manager wasn't in, so I put the caller ( through near by 011 ( Be my guest. Please hang up. to you 07 A-1 had a good time. Let's meet again soon. B Yes, let's. Please ( 3 Ime to your family. tell 2 on me 2 busy Ⓒoccupied Nice to meet you too. Couldn't be better. remember help 08 A: Hello, this is Ben Brown. Can I speak to Mr. White, please? B: Yes, Mr. Brown. Please ( ) the line for a second. catch grab hold ) your own business. Mind Mix □09 A: Could I have the tuna salad and a cup of coffee, please? B:(4) A: No, that's it, thanks Sure. Anything else? The tomato salad? ) to his secretary. up 10 A: Is the Hotel Richmond near here? B: Yes, it's a huge hotel facing the square. You can't() it. bet mention yours help miss Yes. Is that all you want? Would you like the coffee now? 2 Free take Escape (REAR) (WEWEK) (8X) □ 01 02 03 00 Do 0

教えてください！！

01 A: Do you have the time? ) A: Thank you Yes, it's 4 p.m. No, it's too late for that. 02 A: Do you have a moment? ) Are you sure you haven't? I'm not sure. When was it? I'm sure I can think of something. Sure. What's up? D03 A: It's far too hot today! I've lost my appetite. B:( 4 > A: Sure, why not? Are you on a diet? The spaghetti tastes great. No, I'm busy now. Yes, I have a lot of time. 04A: Good luck on the exam, John. B: ( ) Do you eat here often? Something cold to drink then? Thanks, Mary. I'll need it.. Thanks, Mary You're welcome. Yes, I know I won't let it happen again. No, it's OK. I can sit over here just as easily. 05 A: You don't have to be afraid of this gorilla. B: ( ) He looks really strong and dangerous! A: Don't be so upset. He's quite mild-tempered. DWho cares! I told you so! You can't be serious! You're right! (PERK) MAYRO 06 A: Could you give me some advice about the schedule of classes? B:(4) For the first year, you have to take the required courses. You can say that again. It's none of your business. Tomorrow would be better. It'd be my pleasure.

教えてください！！

□09 A: Could I have the tuna aalad and a cup of coffee, please? B(4) A: No, that's it, thanks. Sure. Anything else? The tomato salad? 10 A: Is the Hotel Richmond near here? B: Yes, it's a huge hotel facing the square. You can't() it. bet mention 011 ( ) your own business. Mind Mix 12 A: ( Yes. Is that all you want? Would you like the coffee now? agree Ⓒhurry help miss > How have you been? B: Just fine. I'm sorry I didn't write you. A: That's all right. I didn't, either. It's been a long time. It's no short time. 14 A: Who wants to sing a song next? B:( ) Good for you. It's my turn. 2 Free Escape 13 You should leave at once. You have no time to ( ). arrive There was a lot of time. There's much time. Ⓒlose That's great. I'm afraid so. OERANA (#8X95)

物理の荷電粒子の問題です。 黄色マーカーで引いたところが分かりません。 「y軸に垂直な平面内に正射影すると等速円運動になる」とはどういうことでしょうか？ また式変形でも、どこから「n-1」が出てきたのでしょうか？

る。質量m, 電気量g (g>0)の荷電粒子Pを, 原点Oからxy平面内でx軸の正の 図3のように,y軸の負の向きに磁束密度の大きさB の一様な磁場がかけられてい 向きと角度をなす向きに速さで打ち出したところ, Pはy軸上の位置 (0, L) の点 Qを通過した。 B L. 荷電粒子 P y O 点Q usin 0 → naso 図3 700 → x 問7 荷電粒子Pの運動をy軸方向から見ると, 等速円運動しているように見える。 この等速円運動の半径と周期を求めよ。答のみでなく、 途中の式・説明も示せ。 -41- 問8 磁束密度の大きさをBからわずかに小さくし, 原点Oから荷電粒子Pを図3の 場合と同じ速さ、同じ角度の初速度で打ち出す。さらに磁束密度の大きさをわ ずかに小さくして、荷電粒子P を同様に打ち出す。 このような操作を繰り返して いく。このとき、荷電粒子Pは点Qをいったん通過しなくなったが, 磁束密度の 大きさを2Bにまで小さくして打ち出したとき,Pは再び点 Q を通過するように なった。 Lをm, g, v, B, 0 を用いて表せ。

物理の磁気の問題です 黄色マーカーで引いたところの解説をお願いします

188 第4章 電気と磁気 §9 ** 147 【12分 ・20点】 XXXXXX 2枚の同じ大きさの金属板A, B を d離して平 行に並べる。 座標系を図のようにとる。 軸方向の 金属板の長さは である。 金属板Bを接地し, 金属 板Aに正の電位Vを与え, A,B間に一様な電場を 作る。 電子がx軸に沿って A, B間に入射し, 座標 軸の原点0を速さで通過する。 電子の質量をm ○電荷を一とする。 電子によって金属板に誘導され る電荷や, 電子の運動に及ぼす重力の影響は無視す る。 問1 金属板の間で電子が受ける力の大きさFはい くらか。 ①ev 問2 ① 荷電粒子の運動 F ① -t m @v+ Ft m 01/01/ ② 3 のFを用いて表せ。 成分 : 1 z成分: 2 9 ひ e V d 2= 4 ③ 2 eVd また,この力はどちらを向くか。 2 ① x軸の正の向き (2) y軸の正の向き ③軸の正の向き ④軸の負の向き ⑤y軸の負の向き 6 z軸の負の向き 原点Oを通ってから時間t後,電子の速度の成分, 成分はいくらか。 問1 V. e F (5 -t Vd e また, 加える磁場の磁束密度の大きさはいくらか。 V Vd (5) vd V F (3 4 v-- -t m m 問3 金属板の間で電子が描く軌道を面へ射影したものを、 問1のFを用いて表 せ。 Fx 2 Fx Fx ① z= F 2m (モ) (3 ²=- 2mv 2mv 2m v 問4 電子が金属板に衝突せずに,右端z=l, z=s に達した。電子が金属板の間を 通過する間に,その運動エネルギーはどれだけ増したか。 問1のFを用いて表せ。 ① Fl ②Fs ③ F(l+s) 4 F(l-s) 問5 電場はそのままで, 金属板の間に一様な磁場を,ある座標軸方向に加え,『軸 に沿って入射した電子をそのままæ軸方向に直進させるには、磁場をどの向きに 加えればよいか。 1 解答群は問1 2と共通) y Vv d 2 O 2 44 V ed で A B ²- til-15 E 対磁ので FF