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物理 高中

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

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物理 高中

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

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英文 國中

有人會寫嗎謝謝

3 : WNI (16-25 H 10 ) Lesson 3 89 10 20 What happened to him? Eric: Really? 17. he never came to any of our activities. How could he do that? Erie: Mike didn't come to my birthday party last weekend, and he missed the picnic yesterday, too. Ben: He is doing okay... In fact, I just saw him yesterday. 16. Ben: He was practicing basketball with his team on the basketball court. Eric: Oh, I know it! Ben: Well, basketball means a lot to him. Eric: I sometimes even get angry at him because he doesn't treat me as a true friend. Ben: But Mike finally 19. him. Eric: Yeah. You are right. I just miss the good old days when we played together and shared everything with 20、 Ben: I know, I miss the good old days, too. 18. his favorite thing in life. He is a really great player, and we should be Dangry 生氣的 should be ( ) 16. (A) When was that? (C) What was he doing then? ) 17. (A) After he joined the team (C) After you saw him ) 18. (A) looked for (B) was looking for ) 19. (A) happy of (B) proud of ) 20. (A) each other (B) every each (B) Did you see him in the park? (D) Who was with you then? (B) Before he started to play (D) Before we played together (C) was finding (D) found (C) happy on (D) proud on (C) others (D) each one 1~22 Hi Karen, I'm sorry about stopping you when you were studying for the English test yesterday afternoon. dn't mean to do that, and I'm really sorry. As you told me before, you always have a hard time remembering new words. So, I also want are some good ways with you. After I learn a new word in class, I don't spell it out again and ag remember it. First of all, I like to make small word cards. I write a new word on one side and th aning of it on the back side. Then I can study those words everywhere even when I just have a . For example, I enjoy reading through the cards when I am waiting for the school bus. I also arf the Internet to look for songs with the new words in it. Last week, we just learned the word ? And I found the song Treat Myself. It's an interesting and nice song. I often sing the song also learn other words from the song. hope these ways also work for you, and maybe we can study together next time. ☺ - remember 19 spell ## meaninge everywhere a bit 5

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英文 高中

這大題求解

... mer my friends III、綜合測驗:20% There are only a handful of underwater hotels around the world. These 16. guests to do what few people ever dream of doing: sleeping underwater. Fish, of course, do this all the time, but to humans the thought of 17... one's head on the seabed isn't very appealing. That's because mammals like us 18. have sufficient air to breathe. 19. _ ever wondered, therefore, how sea mammals, like whales, manage to get their beauty sleep? A number of 20. have attempted to answer this question. They seem to suggest that whales make use of an 21. sleep technique known as “logging." During "logging," whales are 22. to shut down just one half of their brains. This enables them to get some much-needed rest, and yet at the same time remain alert enough to regularly return to the surface of the water to breathe. 23. another sea creature that makes use of "logging" to survive is the dolphin. _ 24._ Whales, which can remain underwater for up to ninety minutes, dolphins need to breathe in fresh air above the surface every twenty minutes. Thus for them it's even more important to keep half their brains awake at all times. Logging helps them 25. this. At the end of the day, this is just another example of how human and animal sleep habits are different in strange yet wonderful ways. ( ) 16. (A) let (B) allow (C) make (D) have ( ) 17. (A) throwing (B) burying (C) laying (D) lying ( ) 18. (A) must (C) can (D) will ( ) 19. (A) Will you (B) Do you (C) Are you (D) Have you ( ) 20. (A) secrets (B) habits (C) studies (D) facts ( ) 21. (A) amazed (B) amazing (C) amaze (D) amazingly ( ) 22. (A) able (B) possible (C) capable (D) likely ( ) 23. (A) Just (B) SO (C) Also (D) Yet ( ) 24. (A) As (B) TO (C) With (D) Unlike ( ) 25. (A) achieving (B) achieve (C) be achieved (D) to achieving (B) may V. 文意選填:10%(請忽略大小寫) (A) in fact (B) however (C) amazing (D) standing (E) much Animals sleep in incredible ways. They don't need to lie in bed for hours like we do. Zebras an elephants, for example, can stay 26. while they sleep. This odd sleeping position sound uncomfortable, but it's 27. safer. Predators are always around to catch sleepy prey animals Elephants, therefore, are only away in dreamland for around 3.5 hours a day, Zebras are reported to slee even less. Giraffes, 28., sleep the least of any animal. An average of half an hour per day is usuall all they need to survive in the wild. 29. __, they hardly ever sleep for more than five minutes at a time That's simply 30. __! Can you imagine sleeping on your feet and for less than an hour a day? 6. 27. 28. 29. 30. . among Among Among fantasy novels, A song of favorite. my Ice and Fire is 在 入 267 A 面尚有試題) 6100182 Perguse

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