Một quả bóng có thể tích 2,5 lít. Người ta bơm không khí vào quả bóng bằng pittong có thể tích 0,125 lít dưới áp suất . Giả sử trong khi bơm nhiệt độ được giữ không đổi. Hỏi sau bao nhiêu lần bơm thì áp suất trong quả bóng là .

viet tat ca cac bai tren Số câu: từ 10 đến 12 dòng, có thể kết hợp kiến thức ngữ pháp phù hợp ở phần này (gạch chân, chú thích rõ ràng từ, cụm từ như cụm động từ, cụm danh từ, cụm tính từ) * Lưu ý: Mỗi chủ đề viết thành 1 đoạn văn - Chủ đề: gia đình, nhà trường, bạn bè, phẩm chất đạo đức, môi trường, giao tiếp, ứng xử

h=5m so với măt đất ,v=20m/s ,g=10,tính độ cao cực đại

Trình bày cơ chế tác động của một số chất hoa học ảnh hưởng đến sinh trưởng của vi sinh vật và ứng dụng thực tế. Trình bày ảnh hưởng của các yếu tố vật lí .đến sinh trưởng của vi sinh vật và ứng dụng thực tế.

FeS2->SO2->NaSo3->NaSO4->NaCl->HCl->FeCl3

Giải các phương trình sau bằng phương pháp thế {2×+3y=5 5×-4y=1

Bạn nào biết cách giải không giúp với Đán án A nhé mà trên mạng không nói cách giải

7 Choose the sentence which has a similar meaning to the first one. Question 23. Despite the firefighters’efforts, the building burned down completely. A: The firefighters did not work hard enough, and so the building was entirely burned down. B: The building would not have burned completely if the firefighters had tried harder. C: As a result of what the firefighters had done, the building was destroyed in the fire. D: The fire entirely destroyed the building even though the firefighters tried to stop it. 9 Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions. A: worship B: enjoy C: belong D: behave 10 Mark the letter A, B, C or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) to each of the following questions. Question15. The Thai worship their ancestors. Every year they hold festivals and ceremonies with alternating songs between boys and girls, and many traditional games. A: grandfathers B: forefathers C: grandparents D: fathers 11 Choose the sentence which has a similar meaning to the first one. Question 22. I only remembered we had a meeting when you called me. A: You always phone me to remind me of when our meeting is. B: As soon as I realized that we had a meeting, you called me. C: I didn’t remember about our meeting until you called. D: I was happy because you remembered to call me for the meeting. 12 Choose the sentence which has a similar meaning to the first one. Question 25. There is little hope that Craig will be able to find a job. A: Craig hopes that he won’t have to find work for himself. B: Craig has given up hope of finding employment. C: It is not very likely that Craig’s search for employment will be successful. D: Craig hopes that it will only take a little time for him to get work. 13 Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions. The Space of Gong Culture in Central Highlands The space of gong culture in Central Highlands of Viet Nam covers 5 provinces of Kon Turn, Gia Lai, Dak Lak, Dak Nong and Lam Dong. The masters of gong culture are the ethnic groups of Ba Na, Xo Dang, M’Nong, Co Ho, Ro Mam, E De, Giarai... The gong performances are always closely tied to community cultural rituals and ceremonies of the ethnic groups in Central Highlands. Many researchers have classified gongs as ceremonial musical instrument and the gong sounds as a means to communicate with deities and gods. The gongs are made of bronze. Their diameter is from 20cm to 60cm or from 90cm to 120cm. A set of gongs consists of 2 to 12 or 13 units and even to 18 or 20 units in some places. ‎In most of the ethnic groups, namely Giarai, Ede, Kpah, Ba Na, Xo Dang, Brau, Co Ho, etc., only males are allowed to play gongs. However, in others such as Ma and M’Nong groups, both males and females can play gongs. Few ethnic groups (for example, E De Bih), gongs are performed by women only. As for the majority of ethnic groups in Central Highlands, gongs are musical instruments of sacred power. It is believed that every gong is the settlement of a god who gets more powerful as the gong is older. Therefore, gongs are associated to all events in one’s life, such as the inauguration of new houses, funerals, buffalo sacrifice, new harvest, ceremony to pray for people’s and cattle"s health, ceremony to see off soldiers to the front, and the victory celebration. Gong culture can be found in ________ . A: Kon Turn B: highlands in Viet Nam C: Kon Turn and Gia Lai D: Central Highlands A: running B: riding C: talking D: herding

Giúp mik vs mng ơi cần gáp đừng spam nha cảm ơn mng

It's a ........ cat . a. White. b. Nice. c. Big