Vật nhỏ có khối lượng 200 g trong một con lắc lò xo dao động điều hòa với chu kì T và biên độ 4 cm. Biết trong một chu kì, khoảng thời gian để vật nhỏ có độ lớn gia tốc không nhỏ hơn 500√2 cm / s2 là T/2 . Độ cứng của lò xo là

Hình chữ nhật LQMP như hình dưới được chia thành 6 hình vuông. Hãy tìm chu vi hình chữ nhật LQMP, biết hình vuông màu cam có chu vi là 56dm

Giải giúp tui với !! Làm hết đc thì tốt ạ !

Có nhận xét gì về trình tự Nu của mARN so với ADN? Cho ví dụ minh họa?

Tìm x , bt: a, $\frac{5x^{2}}{x-3}$ $\geq$ 0 b, (x+2)(x-5) ko dương c, ($x^{2}$ + $2021^{0}$).( 2+x) ko âm

Ex8. choose the correct answer to each of the following questions. Ho Chi Minh City is one of the biggest cities in the south of Vietnam, which provides people with a great number of various jobs.Therefore, people from many different parts of the country keep on moving to this city, hoping to find out their ‘paradise’. For those who have been living in this city for a long time, they are getting worse and worse.Pollution is the first thing that makes Ho chi Minh City a worse place to live in. Its drainage system has been overbooked to drain for a city of over seven million people nowadays. Consequently, the so-called ‘the pearl of the Far East’ is getting more and more polluted. Water pollution is only part of the pollution facing all the dwellers of this biggest city in Vietnam. The air pollution here is no less serious. Thousands of factories are still located inside this city and keep on releasing poisonous smoke. Various means of transportation, especially millions of motorcycles, do contribute to the ever-increasing air pollution in Ho Chi Minh city. 1. What city is the biggest in Viet Nam? A. Ha Noi B. Vinh C. Da Nang D. Ho Chi Minh 2. The first problem makes Ho Chi Minh worse is________________. A. population B. pollution C. job D. traffic 3. What two main factors does the writer want to mention in this passage? A.transport and pollution B.population and transport C. population and pollution D. people and factories 4. The word “dwellers” in line 8 is closest in meaning to______________. A. residents B. road users C. motor cyclists D. visitors

Ex7.Choose the correct word or phrase that best fits each of the numbered blanks. Life in the city is full of activity. Early in the morning hundreds(1) _______ people rush out of their homes in the manner ants do when their nest is broken. Soon the streets are full of(2) _______. Shops and offices open, students flock to their schools and the day's work begins. The city now throbs with activity, and it is full of noise. Hundreds of sight-seers, tourists and others visit many places of interest in the city while businessmen from various parts of the world(3)________ to transact business. Then towards evening, the offices and day schools begin to close. There is now a rush for buses and other means of transport. Everyone seems to be in a hurry to reach home. As a result of this rush, many accidents occur. The city could, therefore, be (4) ____ as a place of ceaseless activity. Here, the drama of life is enacted every day. 1. A. of B. on C. at D. for 2. A. school B. tourist C. transport D. businessman 3.A. take B. arrive C. go D. have 4. A. put B.watched C.done D.described

Cho mình hỏi hiện tại mình đang gặp phải lỗi Chúng tôi rất tiếc. Bạn không thể truy cập vào mục này vì mục này vi phạm Điều khoản dịch vụ của chúng tôi. Ai có cách sửa ko

Ex 6 : Supply the correct form of the verb. 1. She said to me that she (sell) ………………. that car the following day. 2. He asked me where I (go) ………………. the previous day. 3. The teacher asked her why she (not do) ………………. the test. 4. I asked her if she (pass) ………………. the final exam. 5. They asked him if he (must) ………………. go then.

Ex5 : Write the correct forms of the given words to complete the sentences. 1. I am going to visit Da Nang, so can you tell me what the greatest (attract)......... in Da Nang are. 2. Don’t worry about travelling because the public transport here is rely on ...... ......( convenient) 3. Sydney is a metropolitan and ………. city, you have differen things to do. (multiculture) 4. My aunt lives in one of the most …………… parts in Paris. ( fashion ) 5. The outdoor food in Singapore are fun and ………………(afford