user-avatar
tranbaohuy0587179497
2 năm trước
Khi nhiệt độ tăng thêm 1°C thì độ dài của một dây đồng dài 1m tăng thêm 0,017mm. Nếu độ tăng độ dài do nở vì nhiệt tỉ lệ với độ dài ban đầu và độ tăng nhiệt độ cũa vật thì một dây điện bằng đồng dài 50m ở nhiệt độ 20°C, sẽ có độ dài bằng bao nhiêu ở nhiệt độ 40°C? to 58
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Help me t anh Smoking causes lung cancer, which is the number one cancer among men. Ninety percent of the people who get lung cancer die. Smoking is also the leading cause of mouth cancer, tongue cancer, and throat cancer.Many smokers have heart disease and pneumonia. Smoking causes one million early deaths in the world every year. Smokers not only harm themselves but also harm others. Smokers breathe smoke out into the air. They breathe it out on their children and their wives or husbands. Children whose parents smoke have more breathing and lung problems than other children. Women who are married to smokers are more likely to have lung cancer than those married to non-smokers. We are all aware that smoking is bad. So why do people smoke? 26. The number one cancer among men is____________. 1 điểm A. tongue cancer B. throat cancer C. lung cancer D. mouth cancer 27. The main cause of mouth cancer, tongue cancer and throat cancer is__________. 1 điểm A. drinking B. overeating C. breathing D. smoking 28. Every year, smoking causes about one million____________. 1 điểm A. cancer patients B. killing diseases C. early deaths D. injured men 29. The word “it” in the passage refers to____________. 1 điểm A. cancer B. smoke C. air D. breath 30. Who are more likely to have lung cancer and lung problems? 1 điểm A. People who live in the city B. People who live with smokers. C. People who live with non-smokers. D. People who live in the country.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team