想問這三題答案🥲有點急🥲

A 卷 HA 高中物理(全) 基礎測驗 (占70分) l to sit by the window with handphone 班級 座號: 姓名: 2-3 物質間的基本交互作用 「尊重智慧財產 請勿拷貝翻印 得分 2 ■選擇題(含單選題及多選題,每題7分) ) 1.質量為24公斤的小孩,在木星表面的重量約為600牛頓,則質量72公斤的大 人,當其在距木星表面高度為2倍木星半徑處的太空梭裡,其受到木星的萬有引 力量值約為若干牛頓? (A) 100 (B) 200 (C) 600 (D) 1800 (E) 5400 2 有關自然界的基本作用力,下列敘述哪些正確?(應選2項) (A)多個質子可以穩定存在於原子核中,主要是因為質子與質子間存在著互相吸引 的萬有引力(B)太陽因為電磁力作用的關係,所以表面持續發射出電磁波 物 體在粗糙面上運動,受到摩擦力作用,使物體運動變慢,故摩擦力屬於萬有引力 (D)弱核力是一種距離極短的作用力(E)原子核中的中子不帶電,但中子與中子之 間仍存在著互相吸引的作用力。 ( ) 3. 右圖為地球的示意圖,其中L、L。兩條虛線分別是地球自轉軸與地 磁的磁軸,兩條虛線夾角為0,A、B兩點為磁軸與地表的交點。下 列對於圖中地磁的敘述,哪些是正確的?(應選2項) (A)A點稱為地磁南極或地磁S極(B)B點稱為地磁南極或地磁 N 極(CB點附近的磁力線方向由地球內部穿過地表,並射向地表上 空(D)0稱為磁傾角(E)0稱為磁偏角。 南半球 18

算式這樣有寫錯嗎～

答: ZA (4n-8) 1 = 240x9 82 n 9. 8n²-36n+72=0Tc 3 h² = 9 n + 18 = 0 1.石頭甲從塔頂處自由落下的瞬間,另一石頭乙由塔頂下方21m處亦自由落下 xm 結果兩石頭同時著地,求塔高若干? H 17m 21 m g - 2CH-

請問第十七題的DE🥺🥺🙏🙏

001(8) 02 )17. A、B 和 C 三個物體放在旋轉圓臺上,如右圖所示,靜摩擦係數均 001 (9) 為u,A的質量是2m,B和C的質量均為m,A、B 離軸 R,C離 軸 2R,則當圓臺旋轉時,若A、B和C均沒滑動,則下列敘述何者 正確?(A)C 的切線速率最小(B)A、C的向心加速度相向 (C)三者 的摩擦力相同(D)當圓臺轉速增大時,B比A先滑動(當圓臺轉 速增大時,C比B先滑動Orxt-VC 不就呆: 程 B arwin = T² V=YW&V. ED with A (A) 山五金工 Th e CV ac=12 Cae Bhe buts所生产 做某

畫線的是什麼意思阿

20:13 ① 張 p = ? kgw 分析人士 木箱 + 台) 3T = 10 + 100 + 70 = 180 T= 60 fimax) =((max) N *N loogw FIN CS # 阿呆等你野的拓p?kqu = H+T=W (B₂min). W min = T (N=0) 110 + w min = 3√ = 110+ wmin = 3 w min. wmin =55 # @圖。為鑷子 pop' 夾住玻璃球的側面示意圖,圖為對xy 水平面的俯視圖,即pop'在xy平面上,且阪通過玻璃球球 心在鑷子的兩側Q和Q'兩點各施以水平中將玻璃球夾住 已知 of = op' = 6 cm. OQ= 0' = = cm, 鑷子尖端和玻璃球的靜 摩擦係數為0.15,玻璃球車100可以設鑷子使用時不會形变則 要將玻璃球夾起來所需min的水平施力F的溢?牛頓?(重五 to 9 = 10 m/s) F = T = 60 * 若按人來操制定欲在人不離開平台 onkyo Bolye 的條件下使整個你先保持靜止人的体重至少要? kg以才能達成任務? 分析人 N Q/F 圖a) 下 ✓ f(max) = 1 (N) Scanned with CamScanner Q' > MSX N = 1 (N) 2 x 0₁15 X N = | (N) 二号间 3 P 合中矩二〇 U bcm Q 2 cm 0 QTF 0.00 KB/S N x b = Exe 1 / 1 x6 => F 1Z0kg w F = 10 # morning glory 3

想請問這四題

98. A baseball is hit straight up and is caught by the catcher 2.0 s later. The maximum height of the ball during this interval is: 4.9 m 2÷2=1 XA) B) C) D) E) 7.4 m 19.4 m 38.8 m 19.6 m 122. DA If the x component of a vector A, in the xy plane, is half as large as the magnitude of the vector, the tangent of the angle between the vector and the x axis is: A) √3 B) 1/2 C) √3/2 3/2 D) E) 3 142. Two vectors lie with their tails at the same point. When the angle between them is increased by 20° the magnitude of their vector product doubles. The original angle between them was about: A - B = |A|| B|cos O 2 L² cose = L² cos (0+20²) 2005 = cos@casso. sing sino A) 0 B) 18° C) 25° D) 45° E) 90° BA 158. Identical guns fire identical bullets horizontally at the same speed from the same height above level planes, one on the Earth and one on the Moon. Which of the following three statements is/are true? A) III only B) I and II only - 0-9 cose-adsint I. The horizontal distance traveled by the bullet is greater for the Moon. II. The flight time is less for the bullet on the Earth. III. The velocities of the bullets at impact are the same. I and III only II and III only 1.1 cos@=-035n9. tant = 1/3 C) D) E) I, II, III h-Vortat² xoxt-txt tu-Jite

在講什麼😀

A rope of mass M and length L hangs vertically. What is the time I needed for a pulse to travel from the bottom end to the support? (A) 0.5 (L/g)0.5; (B) (L/g) 0.5; (C) 2 (L/g) 0.5; (D) 2 (L/g); (E) None. Which statement in want for the 66t 220

第十三題，不太懂要怎麼計算那段繩張力

mg A V (30) (8) or (D) (b) ( 1 V Vz 質量同為m4"B、C三球,以長度均為L的三條輕繩連接,使其 Tistro 繞O點作等速圓周運動,假設A球的速率為y。試回答下列問題: 11. 求B球的角速度為何? C v = 2 With 2v 2L L 2L L ( 的 12. 求C球所受的向心力量值為何? 3my? 人。 (A)- (B). (C) (D) mL (E)jm-L 3L L 3 2 zm ve TAB-TBC L 2my? 3my? Smy? 7 (B) L (E L L L 3 M3V my? my2 LL zmu? C: 3m va 13 求 AB 繼張力的量值為何? CA (A) (C) (D) mL (6)mL (D) -mv²L 0

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

想問問這題～謝謝

9 ) 9 x 算力障数為之登载,为尝00) 受化3:2的新,墓 上等以便小百 ttjsp致 質量為m6] 生物骨堂,放置於光 |司上人不 ,步-1 早上)。」對於50kx-C) ) ,斗y国 LE务信功真施力! (Hlbkx un rkx wtex with a ) (E) 4 kx Immon tullu 777