Một quả nặngcó khối lượng 250 gam đang được treo nằm yên dưới một lò xo .a.Tại sao quả nặnglại nằm yên?Kể tên các lực đang tác dụng vào quả nặng? b.Tính cường độ các lực đã tác dụng vào quả nặng này?

Giúp mình bài này với mình sắp phải nộp bài rồi

Giúp em vs ạ em cảm ơn mọi người nhiều

I. Circle the word that has the underlined part pronounced differently from the others. 1. A. closure B. leisure C. pleasure D. sure 2. A. century B.combine C. collect D. concert 3. A. future B. return C. picture D. culture 4. A. general B. garden C. go D. get II. Choose the best answer to complete the sentences. 5. I don’t like rock. My sister doesn’t,________ A. too B. either C. so D. not either 6. Dong ho paintings are made on ________ paper with beautiful ______ colours. A. tradition – nature C. traditional – natural B. traditional – nature D. tradition – natural 7. Teenagers in Viet Nam like K-Pop. They like korean films,__________ . A. too B. so C. either D. however 8. Did this man ________ that portrait ? A. work B. draw C. write D. play 9. Arts are important in _______, especially for young children. A. education B.educational C. educationally D. educate 10. The Japanese eat a lot of fish instead of meat, ________ they stay more healthy. A. because B. although C. so D. but 11. Americans ________ the tradition of volunteering since the early days of the country. A. had B. have had C. has had D. to have 12. Eating a lot of junk food may lead to ________. A. obesity B. fitness C. pain D. stomachache 13. This year’s musical festival is not ________ it was last year. A. as good as B. worst C. worse D. as well as 14. The themes of the puppet shows are ________ A. city B. country C. rural D. urban 15. How many novels ________ Charles Dickens ________? A. have- wrote B. does- write C. did-write D. did-wrote 16. Nowadays people spend hours ______in front of the computers. A. sit B. on sitting C. to sit D. sitting III. Read the passage and answer the questions: COUNTRY MUSIC There are many genres of music. A genre is a category of a kind of music. A few examples of music genre are classical, pop, rock, hip hop, blues, jazz, and country. October is country music month. Country music came to America long ago. It came from England on a slave ship from America. In the United States, it began in the Southin the 1920s. That was a long time ago. The music of Fiddin’ John Carson was one of the first hit in our country. It was then called ‘hillbilly’ music. You may be able to listen to this first song on the internet. The fiddle (or violin) was the most common instrument because it was easy and inexpensive. Other instruments were added including the bargio, accordion, bass, guitar and drums. All of these instruments create different sounds. Over the years, country music has become more popular. In 1927, 104 million units were sold. In the year of 2007, about 500 millions units were sold. It is safe to say that the country music genre is still very popular today.​ Answer the questions: 1. What is a genre of music? …………………………………………………………………………………………………………….. 2. Did country music come from England ? ……………………………………………………………………………………………………………… 3. Where did country music begin in the US in 1920s? ……………………………………………………………………………………………………………… 4. Why was the violin the most common instrument? ……………………………………………………………………………………………………………. 5. What are some music genres ? ……………………………………………………………………………………………………………… VI: Choose the word whose underlined part is pronounced differently from the others. 1. A. arrived​B. watched​C. packed​D. typed 2. A. married​B. called​C. changed​D. rented 3. A. started​B. worked​C. waited​D. landed 4. A. needed​B. liked​C. washed​D. hoped 5. A. robbed​B. seemed​C. cooked​D. begged 6. A. played​B. frightened​C. excited​D. bored 7. A. hand​B. transport​C. character​D. celebration 8. A. washed​B. attended​C. decided​D. disappointed VII. Give the correct form of the verbs in brackets. 1. An island (cover)………………………………………. by water. 2. I (invite) …………………………………………...… to the party last night but I didn’t come. 3. Many accidents (cause)…………………………….…… by reckless driving. 4. He has worked very hard since he ( be)………………………..……here. 5. We won’t go before he (get )…………………………………………back. 6. I haven’t seen him since he (arrive)……………………………………. 7. I (be)…………………………………………… busy since we last met. 8. The news (be)……………………………………..quite alarming yesterday. 9. We (not live)………………………………... in England for two years now. 10. At this time next week, we (live)…………………………………..in USA. 11. My family is trying (decide)…………………………………..……where to go on holiday.

Vai trò của nghiên cứu lịch sử phát triển của sinh giới

1)a) Tính khối lượng glixerol thu được khi đun nóng 4,45 kg (C17H35COO)3C3H5 với dung dịch NaOH b) Tính khối lượng NaOH và glixerol stearat cần dùng để sản xuất 5 tấn xà phòng.Sự hao hụt trong quá trình phản ứng là 20%

Hãy nêu những điều cần biết về dòng điện 1 pha, 2 pha, 3 pha?

.Cho tam giác ABC có A=30 do,B=120 do . Chứng minh tam giác ABC cân.

Một quả nặng có khối lượng 250 g đang được treo nằm yên dưới một lò xo a Tại sao quả nặng lại nằm yên? Kể tên các lực đang tác dụng vào quả nặng? b Tính cường độ các lực đã tác dụng vào quả nặng này?

tìm số nguyên x , y sao cho : x nhân y = -11 và x nhỏ hơn y tìm số nguyên x , y sao cho : x nhân y = -15 tìm các sô nguyên x , y sao cho ( x - 3 ) nhân (y+2)=5 tìm các số nguyên x , y sao cho (x-2) nhân (y +10=5