自然科學 大學 5天以前 物理,請問這題若用能量守恆該怎麼解?謝謝好心人。我用能量守恆算不出正確答案😭 A uniform rod of length L = 6m and mass m = 10 kg is freely pivoted about a horizontal axis at one end. It falls from a vertical position. Find: (a) the angular acceleration of the rod when it is at angle -40° to the vertical; (b) the velocity, and (c) the linear acceleration of the free end when 0-40° (20%) (a). ET=Iα Mg-(+)-sin 40° = = m²α α=355440° 2L =151 rad/s 72103 cbz 1=67240 a=fetar mg V=WL a = αL =142 2+= 4*L =1.48x6 =13.14. =0+2+157x7 = 8.88 m/s = 16.17m/52 =2.19 W = 1.48 rad/s 待回答 回答數: 0
英文 高中 7天以前 請問為什麼不是B🙏🏻 D = Ohly 108. Merely having an EMBA degree doesn't make one C management position. (A) qualification (B) qualify (C) qualified 有資格的 (D) qualifying for the 待回答 回答數: 0
英文 高中 7天以前 如圖,42行 他寫成 「I had the chance ….,I feel truly lucky 」 請問是他寫錯了應該「時態一致」,還是「時態一致」這句話本身有問題 YouTube Although some aspects of the ba-oh have changed in Conj (n)層面 40 modern times, the spirit 18 of gathering together to have fun 在現代 has always remained.維持不變 Having the chance to experiee this fascinating event, Because/As I had the chance,... I feel truly lucky. It is the first story that I will share with my friends and family when they ask me about my student 45 exchange experience in Taiwan. Written by André Louw and Nick Kembel 龍騰文化 REDCAREER 待回答 回答數: 0
英文 高中 9天以前 英文,文法,關係代名詞,選錯的選項1,2,3,4,5: 1[This country suffers from] poisonous gender politics. 2[Many young men regard woman's advancement as] a thr... 繼續閱讀 待回答 回答數: 0
英文 大學 9天以前 英文,文法,關係代名詞, 選擇題並解釋,應該是選出英文句子中,文法錯誤的選項位置1,2,3,4: 1 [Like] Christian art, which influences people 2 [to have ] religious feelings, the goa... 繼續閱讀 待回答 回答數: 0
英文 高中 9天以前 英文,文法,關係代名詞, 選擇題並解釋,應該是選出英文句子中,文法錯誤的選項位置1,2,3,4: 1 [Like] Christian art, which influences people 2 [to have ] religious feelings, the goa... 繼續閱讀 待回答 回答數: 0
英文 高中 10天以前 請問這題為什麼要選A 戊 1. In the movie, the Harvard-m lawyer leads a perfect life, but a heart- secret about his past is revealed and ruins everything. (A) educated; breaking (C) educated; broken (B) educating; broken (D) educating; breaking 待回答 回答數: 0
化學 高中 12天以前 為什麼過量而不沉澱的是Al而不是Cu 答 解 例題 11/ 離子之分離 CHOJIA (HO) 某一溶液含有 Nat、Ag+、Cu²+、Ba²+、AI+五種離子,進行下列檢驗,試寫出沉澱物 化學式。 HCI -沉澱AHO O.H HS 溶液 沉澱 B -濾液 過量 NaOH O.H THE NUS -沉澱 C HNO, - 濾液 -沉澱 D WW H2SO4 -濾液 PARARE 130A - -濾液 A: AgCl ; B = TollOLD; C: Al(0x173 ; D: Ba584 Cu(OH) 9 A1+ (aq) NaOH NaOH 811041)3(5) → 過量 Al(04) 4 (aq) HINDA Alons 8 含有 Ba²+、K+、Cu2+、Mg2+、Ag+離子的水溶液,依下列te.com 5. 待回答 回答數: 0
數學與統計 大學 16天以前 這題的解答給的是C, 該怎麼求出,感謝! 6. Find the volume of the solid whose region is the intersection of the cube {(x, y, z) : |x| ≤ 1, |y| ≤ 1, || ≤ 1} and the ball {(x, y, z) = x² + y²+ z² < 2}. 16 (A) 32(√2-1). (B) (8-√2). 3 16 (C) (10- √2)TT. (D) √√2π. 3 32 3 待回答 回答數: 0
數學 高中 24天以前 想問這一題 一等比級數之比,前n项和Sn=48,前2n 項和 Szn = 60,則前3n項和Sam= 63: λ= 解 V # 若 答:63,3 Sn. Son-Sn S3n-Son 國 D 36 48 12.x-60 48 3 6. 144=48x-2880 288 288000 48 S 3024 = 481 48/3024 288 The * 待回答 回答數: 0