Hai bình có tiết diện bằng nhau. Bình thứ nhất chứa chất lỏng có trọng lượng riêng d1, chiều cao h1; bình thứ hai chứa chất lỏng có trọng lượng riêng d2 = 4d1, chiều cao h2 = 0,5h1. Nếu gọi áp suất chất lỏng tác dụng lên đáy bình 1 là p1, lên đáy bình bình 2 là p2 thì: * p2= p1 p2= 4p1 p2= 2p1 p2= 3p1 Cíu mk nha iu mấy bn lém cơ moa moa Chọn đáp án thui nha

Các câu hỏi liên quan

Exercise 1: Give the correct forms of the verbs/ words in brackets. 1. What .............................. (you/ do) this weekend? 2. Nga (stay).....................up late yesterday. 3. My father (not usually drink)..................coffee in the morning. 4. Last Sunday, Minh (read)....... books in the library. 5. Water (boil) ...........at 1000C. 6. Each of my friends has a ............................ character. (DIFFER) 7. Nam is very ............................., kind and generous. (SOCIAL) 8. My uncle often spends his free time doing volunteer work at a local ...................... (ORPHAN). 9. She has short .......................... hair. (CURL). 10.Thomas Watson was Bell’s ......................, wasn’t he ? (ASSIST) Exercise 2: Read the passage then answer the questions below. MIRROR IN THE SKY The Moon is closer to the earth than to the sun. It is closer to the earth than to some other stars. It moves around the earth and the earth moves around the sun. The moving of the moon around the earth makes the tides in our oceans go in and out. The full moon shines like a bright ball in the sky. But the moon does not give off any light of its own. It shines by reflecting the light it gets from the sun. If you hold up a mirror to the sun, the mirror catches the sunlight and shines. This is the way the moon shines. There are mountains and valleys on the moon, but there are no living things there. The surface of the moon is covered with dust which still keeps the footprints of the two men who landed on it in 1969. reflect (v): phản chiếu give off (v): phát ra hold up (v): đưa lên tide (n): thủy triều footprints (n): dấu chân go in and out (phr.v): lên xuống valley (n): thung lũng dust (n): bụi Questions: 11. Does the moon go around the sun? 12. Is the moon closer to the earth than to some other stars? 13. What makes the tides in the oceans go in and out? 14. Where does the moon get its light? 15. When did the men first land on the moon? Exercise 3: Make meaning sentences by using these cues below. 16. My sister/ all her/ homework/ yesterday/. 17. She/ beautiful/ intelligent/ enough/ become/ Miss World/ 18. The sun/ rise/ the east/ set/ the west/ 19. Games/exciting/enough/attract/many children/ 20. What time/ you/ finish/ your lessons/ last Tuesday/?