GIÚP TUI NHAA Câu 8: Khi ca nô có vận tốc v1= 10 m/s thì động cơ phải thực hiện công suất P1= 4 kw. Hỏi khi động cơ thực hiện công suất tối đa là P2= 6 kw thì ca nô có thểđạt vận tốc v2lớn nhất là bao nhiêu? Cho rằng lực tác dụng lên ca nô tỉlệvới vận tốc của nó đối với nước.

Các câu hỏi liên quan

1. Last year, I __________ to Japan. 2. While she ________ dinner, he ________ the dishes. 3. ______ you _______ dinner last night? 4. When I _______ breakfast, the phone suddenly ____. 5. What ______ you _____ while you ________? 6. I ______ work, ______ to the beach, and _____ a nice place to swim. 7. ______ you ______ that movie many times? 8. ______ you _______ the book yet? 9. He _______ from the airport at 8:00, _______ into the hotel at 9:00, and met the others at 10:00. 10. I ______ three messages two minutes ago. 11. I _______ to France three times. 12. While we _______ the picnic, it _______ to rain. 13. You _______ since the last time I saw you. 14. James ____________ his homework yet. 15. Sammy _______ for us when we ______ the plane. 16. When I _________ young I ________ in Spain. 17. I ______ them because they ____ always ________. 18. _____ you _____ flour, _____ in the milk, and then ______ the eggs? 19. Many tourists ________ that castle. 20. Peter _______ Japanese for five years. 21. ______ you ______ to Mexico in the last year? 22. My car _________ down three times this week. 23. She ________ in England for six months. 24. They ___________ at the party the entire time. 25. They _________ three tests in the last week. 26. She _______ always ________ to class late. 27. She graduated from university less than three years ago. She _______ for three different companies so far. 28. We ________ on the phone for thirty minutes. 29. ______ you ______ a musical instrument when you _______ a kid? 30. She ________ at the movie theater after school. 31. People ______ much more to make cell phone calls in the past. từ điền vào :1. travel 2. prepare/wash 3. have 4. have/ring 5. do/wait 6. finish/walk/find 7. see 8. read 9. arrive/check 10. receive 11. be to 12. have/start 13. grow 14. not finish 15. wait/get off 16. be/live 17. not like/complain 18. add/poor/add 19. visited 20. study 21. be to 22. break 23. be 24. not stay 25. have 26. come 27. work 28. talk 29. play/be 30. work 31. pay