12題 為什麼是D

12. The event organizer will be available to answer questions about the------- running the workshops. (B) presence (C) presented (D) presenters (A) present 13. Mr. Carlson has worked ------- to attract investors to his real estate development projects. (A) persisted (B) persistent (C) persistence (D) persistently 14. of ours will release an array of new consumer products in the coming months.

想問b小題怎麼算

Gary and Diane must prepare a presentation for their marketing class. As part of their presentation, they must do a series of calculations and prepare 50 PowerPoint slides. It would take Gary 10 hours to do the required calculation and 10 hours to prepare the slides. It would take Diane 12 hours to do the calculations and 20 hours to prepare the slides. (20 points) fa. How much time would it take the two to complete the project if they divide the calculations equally and total hour : 11 + 16 = 27 hr the slides equally? (10 points) calculation : 10+12 2211 81 slides 2 10+20 32161 21 2 ☆ How much time would it take the two to complete the project if they use comparative advantage and specialize in calculating or preparing slides? (10 points) calculation slides C T T Gary lohr ohr Diane 12h 20 hr 3 DX05 2)^0^ hr hr 2

沒給角度要怎麼算啊?

Force R is the resultant of two forces P and Q. If the magnitudes of R and Q are 15 N and 7.32 N, respectively, determine (a) the magnitude of P; (9.93 N or 17.25 N) (b) the projection of R onto the direction of P. (13.6 N) B P 0 a R

有哪位好心人可以告訴我軟性浮凸是哪個 一直過不了很煩

圖案填滿, 圖案外框 • 圖案效果 - 200 225 50 100 50... 套用至選取文字 AAAAA AAAAA AAAAA AAAAA 電專案。 套用至圆案中的所有文字 AAA A AAAAA A> 清除文字藝術師(C) $10 SOOSSA 5 00 es BY9 $25 (±5% 四 第一層 下移一層 三藝術師樣式。在投影片2將標題「流程」的樣式複製給投影片

如果題目給了化學式的英文名字要你畫出結構式，要怎麼知道哪個鍵結要用粗體哪個要用虛線呀？

(b) H -工 H CH3 12 CH3 CH3

求過程感謝😭

5. (1) A projectile lands at the level from which it was fired. (a) For what initial angle is the horizontal range equal to the maximum height? (b) For what initial angle is the range equal to half the maximum height? 6. (II) A projectile is fired up an incline with an initial speed vo at an angle o to the horizontal, as shown in Fig. 4.42. (a) If the angle of the incline is a to the horizontal, show that the range along the incline is 2võ sin(0 – a) cos e 0 R = g cosa a (b) Recast this expression for R by using a trigonometric identity for sin A cos B. For what value of 8 is R a maxi- mum? (c) Show that the maximum value of R is vô R= g(1 + sin a) 90-0-2x 0-a 001 R

求過程感謝(◍•ᴗ•◍)（b=10.9m）(c=25.1度)

31. (II) A medieval catapult, as in Fig. 4.39, could project a 75- kg stone at 50 m/s at 30° above the horizontal. Suppose the target is a fortress wall of height 12 m at a horizontal dis- tance of 200 m. (a) Would the stone hit the wall? (b) If so, at what height, and (c) at what angle?

請問第七題怎麼解

60 s, turn 90 20 km/h for 2.0 min, turn 90° to the point, (a) how far are you from your starting point, and what direction relative to your initial direction of travel are you? V During volcanic eruptions, chunks of solid rock can be blasted out of the volcano; these projectiles are called volcanic bombs. Figure 4-22 shows a cross section of Mt. Fuji, in Japan. (a) At what initial speed would a bomb have to be ejected, at angle 0o = 60.0° to the horizontal, from the vent at A in order to fall at the foot of the volcano at B, at vertical distance h = 2.60 km and horizontal distance d = 9.40 km? Ignore, for the moment, the effects of air on the bomb's travel. (b) What would be the time of flight? (c) Would the effect of the air increase or decrease your answer in (a)?onatlar slow orl w moito Movisio Olovo vibolov te tootsodio dos olvistatani se moltotib nur no vodo as vd botu 29 vd baidot otsi Nomstl moll bottom 12 A plane flies 5 then 1100 km sout) trip, what are the displacement, the velocity, and (e) is 13 An astronau of 4.5 m. (a) Wha eration has a ma minute are requ period of the m 14 A basebal mum height al after reaching that is 86.0 m (a) What may ball? (b) How the ball strike blitt 00 Troede Vibolov sister sam 12 d B 15 The ran also on the place to plac broad jump (where g= by how mu instead in 1 Figure 4-22 Problem 7. 8 Oasis A is 90 km due west of oasis B. A desert camel leaves A and takes 55 h to walk 75 km at 37° north of due east. Next it takes 45 h to walk 65 km due south. Then it rests for 5.0 h. What are the (G) magnitu Cia

真的超不懂 有沒有厲害的人可以解答 不好意思 感謝

Xo=0 X 3-8 Solving Problems involving Projectile Motion Example 3-10: Level horizontal range. (a) Derive a formula for the y = 0 again here horizontal range R of a projectile in yo = 0 (where x =R) terms of its initial speed v, and angle ©. The horizontal range is defined as the horizontal distance the projectile travels before returning to its original height (which is typically the ground); that is, y(final) = yo. (b) Suppose one of Napoleon's cannons had a muzzle speed, vo, of 60.0 m/s. At what angle should it have been aimed (ignore air resistance) to strike a target 320 m away? R 60° 30° 35 en )

請問有人會這部分嗎謝謝🙏

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