自然 國中 約2小時以前 不太懂感應電流 有大神可以教我怎麼看嗎? 還有請教下面這些題(題組是問錯的(20題是單純有疑問 感謝🙏 解 三 如圖為磁鐵棒、線圈與檢流 計形成的電路,試回答下列的問 題: 1. 磁鐵 N 極向下插入線圈時,線圈 司 真 因感應所生之磁力與磁鐵相吸或相斥? 答:相斥。 (D)」。 2.磁鐵的N極向下插入線圈時,線圈上方感應生成 極。輪5 檢流計 A 3. 磁鐵 N 極向下插入線圈時,線圈中的電流由上方俯視為 ②時鐘方向(檢流計指針向/21(塡左或右)偏 4. 磁鐵 N 極向下插入線圈時,如果八 點 極下移速度加快 檢流計指針偏轉角度會增加、減少或不變? C:掃推獨中創建 踴 待回答 回答數: 0
自然 國中 約2小時以前 感謝🙏 ( ☆小李朝著箭靶射箭,已知箭穿進箭靶的瞬間,其動 能為2000焦耳。假設箭靶對箭的阻力固定為40000牛 頓,則箭穿入箭靶幾公分後會停下? CS 掃描熊王創建 (B)4 (A)3 4000 10 (C)5 。 TEISED b xx4000 待回答 回答數: 0
數學 高中 約10小時以前 請教一下第二小題🙏🏻非常感謝!!! 3. 將ARCHERO的字母任意排成一列,則: (1)若將母音保持A,E,O的順序,有420種排列的方法。 (2) 若將母音保持4,EO的順序,且C,H不相鄰,有 的方法。 解 (1)A, E, O視為一組 共有7個字母 7 1x6x5x42 3300 = 1x21 = 420 A-EO RRCH 種排列 (1 (43 (53 34 高中數學(二)習作 已解決 回答數: 1
英文 國中 約13小時以前 想請教這三題文法題(目前無正解) 感謝🙏 Be This movie is adapted from a famous novel people of all ages. D is popular with T *adapt 改編 (A)it (B)that (C)what (D)x DABAIL housework. (A)which I did yesterday was stay home and help my mom do (B)what (C)who Brain: What's wrong? You look so worried? (c)beobje but (D)thatook a (D)ausz 'Y' T Jean: I can't find the way. How could this happen? I checked the map before go on the road. Lip Rese NICU dhits biscione Brain: Don't worry. Let's see _ 19 there is any road sign. Jean: Oh, no. I think we are lost. What can we do now? Brian: Look! There is a man walking over there. We can ask him the way. Jean: You mean the one _20_ has long hair? But he looks like a stranger to Br ( this town.6-2 It's OK. Let me try! (c) 2 (D)(per 192162 (A)where LONY (B) when (C)if (D)how B 20. (A)which ANJOW (B) who (C)he top (D)what I VUAOUG 已解決 回答數: 1
英文 國中 1天以前 大概有七題的英文文法問題 (有打勾勾的地方✔️(我把他整理成一張圖片了 感謝善心人士解答💗💗 B (用於否定句 (B)where (A)what MEGK MSX FILTE yourself. (C)whether (D)how you see is not necessarily true. You should find the answer opol (A)That (B)What (C)Which (D)How (A)who (B)whom (C)which (D)when The five-star hotel (A)for (B)in F (C)with ☆! can't understand this article. It is written (D) English. Can you help me? you (A)by (B) of (C)on (D)in [OAG Mr. Wang grows a lot of fruit (A)which eats (B)it smells we stayed last night is really beautiful and (D)from sweet and juicy. (C)it is (D)that tastes 3. Mr. Chen is a busy businessman. He likes to spend his free time hungry to death! 260206 (A)with (B)without (C)from EXE MSG (D) off 2pG T8 Brian is a famous musician. He became successful² dnie Bood again and again. USE (B)with practicing Je Tue 50 su WARUSM 16 129 Cute cou (A)by (C)along (D)for 8. The boy is really a genius. He entered a great college and became a A (A)beside (B)around The airplane was flying (A)through A 14. (B)across GLEN (C)under Taipei and Hong Kong. (C)between (D)among (D)between 為所環繞 (Alfor (D)ofue 14. This movie is pats only. It is full of volence and blood. Bito (C)from Macy is my new friend I knew on the Internet. She is a Canadian, and we often send e-mails to each other. Macy's birthday is 16 June 20, and she is fifteen this year. She plays basketball very well. Actually, she is quite good _17_ sports. She is going to play a ball game for her class next week, and she 18 it. 16. (A)in Mour to 2(B)at 1 (A)on (B)at pong (C)on (C)inabi (C)worried with MOER EAGLA (D)satisfied with (D)x (D) of )18. (A)is excited about ex2999 (B)is interesting in C Dear Vivian:LICE back so late. Paul's 19 his place. - How have you been recently? Sorry for writing you birthday is coming soon. He is going to have a birthday party He'll prepare for some cookies, cakes, and drinks. I'll give him a card and a present. that day? Please let me know. about pe ce quis Will you come 20 (B)0 (clop (D)W Love, Ann 19. (A)at g 218 (B)below (C)over (D)into RPC Aom (A)by (B)with (C)on (D)in 已解決 回答數: 3
數學 高中 1天以前 請教一下這兩題的解法🙏🏻🙏🏻🙏🏻感謝學霸們🥹🥹!!!! 6 4.已知有一組數據(x,y),i=1,2, 8,6mth 20,少對x之最適直線斜率為 另一組數據(x,y)滿 4 1 足x=2x-4,y=-1+33 求yi,對x之最適直線斜率為 10 5.設兩變量x與y的數據如下表。 2 10 # MX = 42 ㄚˇ x 13 4 5 ST 6 a 二 待回答 回答數: 0
數學 高中 1天以前 請問一下🙏🏻🙏🏻這個變成這樣是怎麼配的🙏🏻🙏🏻非常感謝🥹🥹🙏🏻✨✨!!! [類題] 設最適直線方程式為y=ax+b。 則殘差平方和Q = = -(3-(a+b))²+ (3-(2a+b)]²+ (9-(2a+b)² = + (5-(3a+b)] 2 [9-6(a+b)+(a²+2ab+b²)]+[9-6(2a+b) +(4a²+4ab+b²)] + [81-18(2a+b)+(4a²+4ab+b²)]+[25-10 (3a+b)+(9a²+6ab+b²)] =18a²+16ab+462-84a-40b+124 [26+(4a-10)]²+18a²-84a+124-(4a-102 =(4a+2b-10)+2a-4a+24 =(4a+2b-10)+2(a-1)'+22 當4a+2b-10=0,-1=0時,有最小值, 解得 a=1,b=3。 所以最適直線方程式為y=x+3。 範例 63 320 350 114x= 5 =64, 从y= =70, 5 物理 X 60 68 62 99 合計 66 64 320 數學 y 58 80 72 68 72 350 Xi- μl x -4 4 -2 2 0 待回答 回答數: 0
數學 高中 2天以前 想請問這種題目怎麼寫 感謝! Y GR 8 若有黃、綠、紅三色,塗右圖的五個方格,限定兩相鄰方格不可同色 A B C D E ,且三色全用,則共有4種塗法。 • (1)3-1-1 13)2-2-1 1740000 3×2×1=6 672=12 10 10 已解決 回答數: 1
數學 高中 2天以前 請教一下這題要怎麼寫🙏🏻🙏🏻非常感謝!!! B) 2. 從1寫到9999之所有自然數中“5”一共寫了多少次? (A) 1000 次 (D) 3889次 (B) 2399次 (E) 4000次 (C)3600次 已解決 回答數: 1