Đáp án:
\(v' = 250m/s\)
Giải thích các bước giải:
Bảo toàn động lượng:
\(\begin{array}{l}p = p'\\ \Rightarrow M{v_0} = - mv + m'v'\\ \Rightarrow v' = \dfrac{{M{v_0} + mv}}{{m'}} = \dfrac{{70000.200 + 5000.450}}{{65000}} = 250m/s\end{array}\)
Cho tam giác ABC cân tại A, có góc A =36 độ. Vẽ tia phân giác BE của góc B (E thuộc AC). So sánh BE với AE và BC Help me
24. The plane took off though the weather was bad. =>No matter 25. He took a lot of photographs even though the sky was dark. =>No matter 26. Although she doesn’t earn much money, she spends like a millionaire. => Despite 27. Tom will not pass the examination although he studies well. => In spite of 28. He is still fat though he has been on a diet for 2 years. => In spite of 29. Although they lived in poverty, they were always happy. => No matter 30. He got good jobs, he was not satisfied. => No matter what jobs 31. You do any job, you should do it devotedly. => Whatever 32. Although his English was good, he wasn’t chosen. => However 33. Even though I admire his courage, I think he is a foolish. => Much 34. You can use it as long as you like, and it won’t wear out. => No matter 35. Although Judy was severely disabled, she participated in many sports. => Despite 36. However friendly he seems, he’s not to be trusted. => Friendly 37. I admit he’s clever, but I don’t think he’ll this problem. => Clever 38. She never comes to the office on time although she gets up so early. => No matter 39. He had enjoyed the lively company of his friends in Edinburgh. All the same, his work, he felt, demanded solitude. => Much as 40. Come and sit down, whoever you are. => It doesn’t matter 41. It doesn’t matter how hard she tries, she never beat Sue at tennis. => However 42. No matter what he says, nobody believes him. => Whatever 43. He always woke up early no matter how late he had gone to bed. => However 44. Melissa’s father was very busy, but he still played with her. => Busy 45. She didn’t eat much though she was hungry. =>In spite of 46. Although he had much experience in machinery, he didn’t succeed in repairing this machine. => Despite 47. We did the test well though it was difficult. =>In spite of 48. Although he is strong, I’m not afraid of him. => Despite 49. The plane took off though the weather was bad. =>In spite of 50. Though his English was good, he wasn’t chosen. => Despite 51. Although the streets are narrow, many people drive in this city. =>In spite of 52. Mr Pike doesn’t wear glasses though he is over sixty. => Despite 53. He ate the chocolate cake even though he was on diet. =>In spite of
Exercise 6: Rewrite the sentences, using although or in spite of. 1. Although I was very tired, I didn’t sleep. => No matter 2. Although I was hungry, I didn’t eat anything. => No matter 3. Although he felt unwell, he went on working. => No matter 4. Although he was disappointed, he tried to smile. => No matter 5. He still goes to school although he isn’t fine. => No matter 6. Although the salary was low, he accepted the job. => Despite 7. In spite of their quarrel, they remain the best of friends. => Though 8. In spite of the bad weather, they went out for dinner. => Although 9. In spite of his age, he still leads an active life. => Even though 10. In spite of his hard work, Ba he failed his exam. => Though 11. In spite of the heavy rain, we decided to go to see the match. => Although 12. Although they lost, the home team played very well. => Despite 13. Even though it was raining, I still went to school on time. =>In spite of 14. Although she isn’t brilliant, she studies quite well. => Despite 15. She isn’t brilliant but she studies quite well. => Although 16. The house isn’t nice, but I like the garden. => Even though 17. It was raining, but we went out. => Though 18. Everyone likes Bob even though he talkative. => Even though 19. Though I had an umbrella, I got very wet in the rain. => Though 20. We enjoyed the vacation although it rained a lot. => In spite of 21. I couldn’t sleep though I was very tired. => Much 22. I didn’t get the job even though I was extremely qualified. => Despite 23. He ate all the fruits although they were green. =>No matter
Exercise 5: Rewrite the sentences with the word given. 1. Although he has a very important job, he isn’t particularly well-paid. =>In spite of 2. Although I had never seen her before, I recognized her from a photograph. => Despite 3. She wasn’t wearing the coat although it was quite cold. =>In spite of 4. We thought we’d better invite them to the party although we don’t like them very much. => Despite 5. Although I didn’t speak the language, I managed to make myself understand. =>In spite of 6. Although the heat was on, the room wasn’t warm. => Despite 7. I didn’t recognize her although I’d met her twice before. =>In spite of 8. We’re not very good friends although we’ve known each other a long time. => Despite 9. Although Minh was ill, he still came to the meeting. =>In spite of 10. Although he promised that he wouldn’t be late, he didn’t arrive until 9 o’clock. => Despite
Exercise 4: Complete the sentences with your own words: 1. Although my mom sing very well,____________________________________________. 2. Although ___________________________________________, I can’t sing English song. 3. Sue didn’t come to my birthday party last Sunday though__________________________. 4. Although my school is far from the city, many students____________________________. 5. We really enjoyed the trip to the museum last week though_________________________. 6. Although my sister can draw very beautifully, she________________________________.
tóm tắt truyện bài học đường đời đầu tiên
Exercise 3: Rewrite the sentences, beginning with the words in parentheses 1. She has plenty of money, but she is very mean. (although) => 2. They have a car, but they rarely use it. (though) => 3. He was innocent, but he was sent to prison. (although) => 4. He has a number of relatives living nearby, but he never visits them (even though) => 5. She never takes any kind of exercise, but she is quite fit and healthy. (even though) => 6.The keyboard wasn’t working well. She tried to finish the letter (although) => 7.The forecast said it would rain. It turned out to be a beautiful day. (although) => 8.I’m no better. I’ve taken the bill. (even though) => 9. The traffic was bad. I arrived at the airport on time. (though) => 10. I didn’t get the job. I had all necessary qualifications. (though) => 11. We enjoyed the vacation. It rained a lot. (although) => 12. She felt sick. She went to work. (though) => 13. I was really tired. I couldn’t sleep. (even though) => 14. He is very rich. He isn’t happy. (although) => 15. She couldn’t answer the question. She is very intelligent. (though) => 16. He tried. He was not successful. (though) => 17. His life is hard. He determined to study well. (although) => 18. He was wise and experienced. He was not taken in. (though) =>
Exercise 2: Combine these sentences using: though, although, even though 1. Lion dancing is very popular in Viet Nam. My friend Anny does not enjoy it. => 2. Bob always walks to work. He is living in the city. => 3. My house is near the beach. I rarely go swimming. => 4. My brother is working in Ha Noi. He comes home on every public holiday. => 5. Paul is an Australian, he enjoys Vietnamese New year. => 6 Most children go to see the firework show, Linh and Mai stay home watching TV. => 7. Nick used to smoke. He seems to be in good health. => 8. I couldn’t sleep. I was tired. => 9. Henry’s friend is a millionaire. He hates spending money. => 10. We couldn’t get tickets. We queued for an hour. =>
bác hồ đã tự học bằng cách nào ? em đã học tập được điều gì từ phương pháp học của bác ? em đã chủ động học như thế nào
Cho tam giác ABC đều trên cạnh AB lấy điểm E, trên cạnh AC lấy điểm F, trên cạnh BC lấy điểm P sao cho BE=AP=PC.Chứng minh tam giác EFP là tam giác đều Giúp với ạ~
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