想要問一下18題為什麼不是3/5？ 🙏🙏

在力學中,「功」是一種重要的物理量。功與力F以及位移S的關係式為W-P.S, 其中FS都是向量,F的單位為「牛頓」,S的單位為「公尺」、功是個純量,單位 為「焦耳」。今有位員工要將貨物沿著斜坡,由底端的1點拉到水平端的B點,而此斜坡 的水平距離 12 公尺,高低差為4公尺,如下圖所示。若整個過程中,他的施力不變, 下的水平方向的分力為向右3牛頓,鉛直方向的分力為向上4牛頓,忽略接觸面的「摩擦 力」,請回答下列問題。 144 16 F (in) B 4牛頓 4公尺 9 3牛頓 12公尺 18 將施力F分解成F=a+,其中a/ AB HDL AB。若戶與的夾角為0,試求cos O。 (5分) 12 醒: (3.1).(3,4) 504 3 coso: 3/5 ISTO coso: 5x210 19. 從A到B,分力作功多少焦耳?(5分) 12 解: WFFS D(0,4).(15.) 20] 019 ON 20 從A到B,分力作功多少焦耳?(5分) 12 解: N, W = Fais W Pois * (3,0) 415,9 ) Palcore x la 4/10 = | X - 89 1 x 450 ( 11 = 5 x 13,50 go 10 5LJ.

請問這樣證明是對的嗎

3章 - E 如圖,AABC的三條中線AD、BE、CF 交於G點, 求證入AFG 面積 合AABC 面積。 6 "El com •C TE= EC :SABE- OBEC SAEG=0 GEC SABE - OAEG=GBCC - OGEC - ABG=OBG E D :SABE ABECITA HAABE: ABEC (la ) E = ÉC .E8% 中影 SAEG OEG 、、: HB AAEG OGECCB 1 ) 入FAC、ABC 等高 三角形重心與面積 OFAC = OBFC CB a F :昨-% SAFG OF B G H 局 如圖,AABC中,AD、BE、CF為三條中線,G點 1. Apts , A BEG (8点点) () AGB 面積=ABGC面積-ACG 面積号AA-Afrome 3 OAFC = OBFC (2) AGF 面積=ABGF面積=ABGD 面積=ACGD A FC - AFG -813FC - ABFG-GAGC=SBQ =ACGE 面積=AAGE 面積 AABC 面積。 COAGC=0 BGC=A ABG is ABG = 1/3 o ABC 每個人皆相等 FB SAF G 13FG F8 :: SAFG - OBFG Core $ ..AAFG = 1 SPBG A ABG - ABC & GABG = 0 ABC = AFG = 1 SABC 2 - 1

商用微積分求解這兩題 需要解答過程🙏🏻🙏🏻麻煩了拜託

20 AGU 3 1 24 score o (1) lfogox)=;?. gux)=x+2x45, fax)=g? = f(g(x)) - (90x15Ew=968) (W35 = 3w² = ( 3 cgex)" ) - 二 2 I 2 3 (a)efogun'?g=12, fua)=?)

SCENARIO 8-3 To become an actuary, it is necessary to pass a series of 10 exams, including the most important one, an exam in probability... 繼續閱讀

求解謝謝

9已知a為偶數,求證(20-3)+(a-37+5a是偶數。 證明 2-0 tot UOC COMIX Food Core

21題 教教我QAQ

Section 11.3 Angular Momentum J-s behind rmv a he ur 265 = ? a ter 30. Example 11.1: A 58.1 Iw COMP string and whirled at 18. Express the units of angular momentum (a) using only the funda- momentum of magr mental units kilogram, meter, and second; (b) in a form involving the circular path. Fir newtons; (c) in a form involving joules. marw horizontal and (b) the 19. Use data from Appendix E to make an order-of-magnitude esti- 31. Example 11.2. A stai mate for the angular momentum of our Solar System about the Max 27 the end of its lifetime galactic center. mu = 17.293 of radius 4.96 X 10' 20. A gymnast of rotational inertia 63 kg•m? is tumbling head over heels dwarf of radius 4.21 with angular momentum 460 kg•m?/s. What's her angular speed? 17.99 acted on the core, fine A 660-g hoop 95 cm in diameter is rotating at 170 rpm about its 32. Example 11.2: Astro 22. A 1.3-th-diameter golf ball has mass 45 g and is spinning at central axis. What's its angular momentum? L: 1W=0-66*(0-95) x 140x277.10 km and determin core that collapsed to 3000 rpm. Treating the golf ball as a uniform solid sphere, what's ing with a period of 4 its angular momentum? 18-3 33. Example 11.2. The s 10-598 rpm With her arms outstre Section 11.4 Conservation of Angular Momentum tational inertia is 3.5 23. A potter's wheel with rotational inertia 6.20 kg•m? is spinning (Fig. 11.6b), her rot freely at 20.0 rpm. The potter drops a 2.50-kg lump of clay onto her final spin rate? L = 6 2 x 2-1 = 12-99~13 - 2x2 22 13= 60.48)" x 2.5 W W = 2 . X z W = 20x2T 60 ²2.1 ~ 1 12.574

第21題 到底要怎麼寫ಥ_ಥ

Section 11.3 Angular Momentum J-s behind rmv a he ur 265 = ? a ter 30. Example 11.1: A 58.1 Iw COMP string and whirled at 18. Express the units of angular momentum (a) using only the funda- momentum of magr mental units kilogram, meter, and second; (b) in a form involving the circular path. Fir newtons; (c) in a form involving joules. marw horizontal and (b) the 19. Use data from Appendix E to make an order-of-magnitude esti- 31. Example 11.2. A stai mate for the angular momentum of our Solar System about the Max 27 the end of its lifetime galactic center. mu = 17.293 of radius 4.96 X 10' 20. A gymnast of rotational inertia 63 kg•m? is tumbling head over heels dwarf of radius 4.21 with angular momentum 460 kg•m?/s. What's her angular speed? 17.99 acted on the core, fine A 660-g hoop 95 cm in diameter is rotating at 170 rpm about its 32. Example 11.2: Astro 22. A 1.3-th-diameter golf ball has mass 45 g and is spinning at central axis. What's its angular momentum? L: 1W=0-66*(0-95) x 140x277.10 km and determin core that collapsed to 3000 rpm. Treating the golf ball as a uniform solid sphere, what's ing with a period of 4 its angular momentum? 18-3 33. Example 11.2. The s 10-598 rpm With her arms outstre Section 11.4 Conservation of Angular Momentum tational inertia is 3.5 23. A potter's wheel with rotational inertia 6.20 kg•m? is spinning (Fig. 11.6b), her rot freely at 20.0 rpm. The potter drops a 2.50-kg lump of clay onto her final spin rate? L = 6 2 x 2-1 = 12-99~13 - 2x2 22 13= 60.48)" x 2.5 W W = 2 . X z W = 20x2T 60 ²2.1 ~ 1 12.574

請問學過測驗學或英文很強的大神，我用紫色畫起來的這段話該怎麼翻比較正確

110 95 63 Performance Are Motor Concepts Language Total ite socioeco indings n these TAL-3 itely v eads 89 104 Self-Help 77 88 Social-emotional Self-Help TAL reate esti ifies ess: nor wh 65 Temir Focial-emotional acc ch "F te er 0 H-1510-09 * 3. 5 PAPER+COPY+FAX 雙頭螢光筆 as the Early Screening Profiles, Differential Abilities Scale, and Peabody Picture Vocabulary Test-IV. A recent study favorably evaluates the con struct validity of the DIAL-3 through confirmatory factor analysis (Assel & Anthony, 2009). As noted the instrument was designed to screen for devel opmental delays in three domains: motor abilities, conceptual knowledge, and language competence. An essential feature of the test is that separate scores are reported for each domain. These domains and the 74 fubtests comprising them were rationally precon- derved by the test authors. An important question is whether the 21 subtests “hang together” statistically in a manner that supports the rational grouping into the three domains provided by the test developers, In other words, do the three domains possess a latent reality, or are they merely figments of the imagina- tions of the test developers? Using test results for 1,560 children ages 3 to 6, Assel and Anthony (2009) found an excellent fit between the three domains tra- ditionally reported on the DIAL-3 and three empiri- cally derived domains found through factor analysis, which supports the construct validity of the test. However, these authors did note that Articulation subtest was a poor index of language compe Cotchine subteet

求解40.41題 謝謝！

VI. 混合題:11% Thspire him or her. McDonald's does more than just sell hamburgers. The Ronald McDonald House Charities (RMHC), an independent American nonprofit organization, aims to improve the welfare of children. The core programs of RMHC include Ronald McDonald House, Ronald McDonald Family Room, and Ronald McDonald Care Mobile. Ronald McDonald House There are 375 Ronald McDonald Houses right now, providing a place to stay for families with sick children under 21 years old. These children can receive medical treatment at nearby hospitals. Over 7,200 bedrooms are supplied each night, worth an estimated $700 million in hotel expenses. Ronald McDonald Family Room The 262 Ronald McDonald Family Rooms can be found in 28 countries. Family members who cannot stay at a Ronald McDonald House can come to live in these rooms. These Family Rooms are equipped with basic facilities for resting, doing laundry, or taking a shower not far from the sick children. Ronald McDonald Care Mobile Presently, there are 51 Ronald McDonald Care Mobiles. The mission of this program is to offer healthcare for children from the neighborhood for free. More than 100,000 children have benefited from this service annually. 公舍 B ) 39. What is the purpose of the first paragraph? (3%) (A) To promote McDonald's hamburgers. Solo (B) To give a brief introduction of RMHC. borla bn (C) To compare the three programs of RMHC. (D) To raise our awareness of the importance of charity. 40. Choose the INCORRECT fact from the table below. (3%) Ronald McDonald Ronald McDonald Ronald McDonald Program House Family Room Care Mobile Number (A) 375 262 (B) 51 (C) Waiting rooms for Services Places for families with people whose family (D) Health care for Provided sick children under 21 members are examined children who live nearby by doctors 11. What is the central idea shared by the three core programs of RMHC? Find the answer from the above text and copy it. (5%) lauld lady

請問對嗎

E 4 3. 如右圖,小宏為了測量樹高EF,在樹前方12 公尺處和 15 公尺處各設置了一根垂直地面的木椅 CD 和AB,已知A、C、E三點在同一直線上。若AB 長1公尺,CD 長1.5 公尺,則樹高多少公 尺?(6分) Score $NX=3:15 #6. X=B. S Xt AIG 4.2