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

想請問第二小題物理，謝謝大家🙏

Yo <t. 由平面運動斜拋理論所計算的答案與實際數據不相符的原因,你認為可能有哪些? (服加速度以9.8 m/s² 計,1 m = 3.28 ft) 022-3个 空氣阻力etc 2. 電腦模擬的運動軌跡 在現代的科學研究中,實驗、理論解析、電腦模擬相輔相成,讓我 們得以瞭解更多自然的現象與規律。因此除了解析推導外,也可以 運用簡單的程式,來計算物體運動的軌跡。由於物體受力大多僅與 其位置有關,我們可以藉由以下的運算法,來計算物體運動的軌 跡: y(m) 1.0F 0.8 0.6 23 0.4 0.2 10-60°° 由物體的初始位置,已知所受外力,進而求出該時刻的加速度。 ②利用求得的加速度,可由物體的初始速度,算出下一瞬間的速度。 3 藉由算出的速度,可由起始位置,算出下一瞬間的位置。 ④重複以上的計算步驟,即可求出物體運動的軌跡。 撰寫電腦程式計算時,我們無法取無限小的時距,因此嚴格來說,數值計算得到的是近似的軌跡 點。但只要時距取得夠短,這些軌跡點就會趨近正確的解答。如上圖所示,物體以相同初始速率作斜 拋運動,當拋射角度為 30° 與 60° 時,雖然運動的軌跡不同,但其水平射程相同。此結果與解析推導 相同,可以互為佐證,但許多實際的問題並沒有解析解,若能善用電腦程式計算,就能提供另一種理 解的管道,是非常強大有用的工具。 【混合題】 (1) 分析拋射角度為 60° 的軌跡時,會注意到軌跡點在頂點處較密,而在起始位置或落地處較疏。但若 分析拋射角度為30° 的軌跡時,其軌跡點則較為均勻。針對軌跡點的疏密變化,以下哪些為合理 的推論?(多選) (A)物體在頂點處的速率最小(B)物體在起始位置或落地處的水平速度較小 (C)物體在頂點處的水平速度較小(D)拋出至最高點期間,拋射角度大時,物體的速率變化較大,故 軌跡點疏密變化也較大(E)抛射角度小時,重力加速度較小,故軌跡點較為均勻。 0=30° 0 10.5 1.0 1.5 2.0 (m) (2) 進行電腦程式計算時,每一軌跡點的時距皆相等。若拋射角度為 30°時,其飛行時間為 10.0 s,試 由分析上圖中的軌跡點,估算拋射角度為 60°時的飛行時間為何? 17.55 +ZON 88 STATIONERY CORP LIBERTY

求解

nogetheg xog 17. 一農夫想用 60公尺長的竹籬圍出一長方菜圃,並在其中一邊正中央留著寬2公尺的出入口,如右 圖示。此農夫所能圍成的最大面積為 256 平方公尺 289 平方公尺 zxy 工 Z -X-2 2公尺 64 6 9 21x14248 = A + MY 2 STATY 64 y x+y Z 2x+2y 时 32 32 64 64 2x+2y 32 32 64 2 1024 乙 2 Paxy 1024 ( 红网

請問第九題： 隨著人口越多，情況只會越來越糟。____ ，我們必須做出某些大改變。 空格答案是換句話說，想問這裡用理論上為什麼不可以？

44 Lesson Four B65. (6. (A) reaction (A) 7. (A) into (B) 8. (A) dies (2) 9. (A) In theory (10. (A) fought ) 5. (A) keeping a; eye (B) taking a; toll (B) composer (B) from (B) dying (B) In vain (B) fighting (D) carrying; through (D) switch (D) with (D) die (C) In the beginning (D) In other words (D) fights (C) fight (C) having; at heart (C) scale (C) upon (C) died ※第三篇 In December 2020, members of Singapore's private 1880 club likely noticed a new item on club restaurant's menu. Specifically, the restaurant became the first place in the world to offer 1 meat. The meat itself was developed in a 2. by a start-up based in San Francisco called Eat J Josh Tetrick, one of Eat Just's founders, expressed great praise 3. Singapore for its careful efficient process for approving cultured meat for sale. Tetrick has made public remarks about how promotion of cultured meat could, in the long run, help 4. the fight against climate cha However, some scientists doubt 5. this is the case. REDMI NOTE 8 PRO TAI QUAD CAMERA formed in Finland found that for some types of meat, such as beef and lamb. cultured form indeed had a far lower impact 6. the environment. Howeyer for oth

請問第87和90題🙏

AC pd AS (C) highest melting point of any metal (D) metal's highest melting point of any 87. Biochemists use fireflies to study bioluminescence, (A) the heatless light given off by certain plants and animals (B) certain plants and animals give off the heatless light (C) which certain plants and animals give off the heatless light (D) is the heatless light given off by certain plants and animals 88. Canada has two official languages, (A) they are French and English (B) French and English (C) which they are French and English (D) French and English they are a shock wave caused by a convulsion deep in the ground. 89. An earthquake (A) is (B) that is (C) as (D) although 90. Kenyon Cox, an art critic and painter, best known for his murals, portraits, and decorative designs in public buildings throughout the United States. (A) who is (B) he is (C) is (D) and he is

請問第61題🙏

B CA 59. That is the man (A) who 60. All C I believe to be your father. (B) whom (C) which (D) what is needed is a little more effort to make the catching up faster. (D) when (A) what (B) that (C) which 61. Nebraska is a state whose name comes from an Indian word flatness." (A) means (B) the meaning of (C) meaning 62. The American contribution to the industrial revolution, world. (A) since it was known as mass production, it spread (B) spreading what was known as mass production, (C) it was known as mass production, and spread (D) known as mass production, spread 63. Alaska's Yanert Glacier, "river in the (D) is meant rapidly throughout the about 25 to 30 feet a day. (A) therefore moves down 12,000-foot peaks, proceeds (B) and moves down 12,-foot peaks, proceeding (C) moving down 12,000-foot peaks, proceeds (D) while moving down the 12,000-foot peaks, which is proceeding 64. The common garden pea, also called the English pea,. (A) to grow (B) is grown (C) growing for its edible seeds. (D) grown

K,L🙏 thanks

0 101 2 whose graph is given, state the value of ts. If it does not exist, explain why. lim h(x) 3+ lim h(x) x-07 (h) h(0) (k) lim h(x) x-5+ 2 ✓ 4 X (c) lim_h(x) --3 (f) *_(+\.x) (i) lim h(x) X-2 (1) lim h(x) x-5 6 X whose graph is shown, find a number a iven description. not exist but g(a) is defined. s but g(a) is not defined.

請問k.l

wnloads/ch1%20(2).pdf -2 0 2 tion h whose graph is given, state the value of y, if it exists. If it does not exist, explain why. _x) (b) lim h(x) (c) lim h(x) *13+ x-3 (e) lim h(x) x-0 (h) h(0) (k) lim h(x) x-5+ 2 4 4 X 6 (f) lim h(x) x 0+ (i) lim h(x) x 2 (1) lim h(x) x-5- X on g whose graph is shown, find a number a LE

求英文填空第14題

American Civil War was drawing to a close, French historian Édouard de Laboulaye proposed that a monument be built as a gift from France to the United States 13. the latter's success in building a logrice mi desh gola ebigy sag is most inneb, 0. viable* democracy and to honor the efforts of late president Abraham Lincoln. In addition, it was wen adi smoolsw yedi bloowinnon tont juodur Ingin Split gririch hon Laboulaye's hope that 14. attention to the achievements of the United States in abolishing* slavery*, nousbbs kaino 70090 1150i- grinamed af the French people would be inspired to create their own democracy in the face of a repressive monarchy. bas esmilet tad zestaze, 10 oupazom Isopilog, vavans, of bem clerfin unle Sculptor Frédéric Auguste Bartholdi, known for his large sculptures, was commissioned* to oversee* this di Aquouiry project. The goal was to complete the sculpture in 1876 to celebrate the United States' one hundred years di Jos blod's Houd (a) unorius sail of roomi sibling testtorianiom is gnivig ostil vilicujos ar egys from the United Kingdom. The statue was designated as a national monument in 1924. of 15. viable bom99009 abolish slavery # commission E oversee T 11. (A) this statue locates (B) lay this statue 1 (C) does this statue stands (D) stands this statue 2956i ording ai des d E URED ) (C) which presented (B) to be presented (D) 12. (A) presenting inddsuorit broide and it hort com 2 2000, otel odt or lord catch online nedur to (D) in competition with (C) in celebration of (B) within reach of tol s bening hot blow art (C) 13. (A) close to (D) calling onionat ajoubora waeng no nose od me big wor (B) called (C) 14. (A) calls (D) continent 2996iq wildung jedin bas ellow zeitsleg mis mebom odil 250 lg di 20 low as adored of guidiola moti Tentsio 195712 2011 20200 102 10emerlo brusesse o sbuloni among billing nommo * om III. X vins Dooq (C) by calling (B) ) 15. (A) colonization (B) independence (C) removal : 20% beralamos e on (D) presented o 129 mist (B) annual nam abse (C) short of dito (D) matchmaking (E) keep up consoreilebac

這題可以這樣想嗎？ 因為這句I did not have a mirror then , but if I had had a mirror, I would have lent it to you.（與過去事實相反之假設） 可以改成I did not have a mir... 繼續閱讀

4. If Annie B available tomou 5. I would have gone shopping with Annie if she yesterday. 0 ha 0 Tell 6. I don't have a mirror, but if I 7. I didn't have a mirror then, but if I had had, I would had did 8. I am very tired, but if I weren't I would go to the station I would lend it to you. have lent with