Một thanh nhôm và một thanh đồng ở 100oC có độ dài tương ứng là 100,24 mm và 200,34 mm được hàn ghép nối tiếp với nhau. Cho biết hệ số nở dài của nhôm là 24.10-6 K-1. Và của đồng là 17.10-6 K-1. Xác định hệ số nở dài của thanh kim loại ghép này.

Các câu hỏi liên quan

31. I couldn’t do the test because it was difficult. >> Because of…………………………………………………………………………… 32. I couldn’t read the letter because it was dark. >> Because of…………………………………………………………………………………… 33. I can’t study because it is noisy. >> Because of…………………………………………………………………………………… 34. The train come late because it was foggy. >> Because of…………………………………………………………………………………… 35. The train was late because the fog was thick. >> Because of…………………………………………………………………………… 36. I can’t sleep because the weather is hot. >> Because of…………………………………………………………………………………… 37. All the teacher love him because his conduct is good. >> Because of……………………………………………………………………… 38. Because there was a traffic accident, I went to school late. >> Because of……………………………………………………………………………… 39. Because there is a shortage of meet, we had to live on beans. >> Because of……………………………………………………………………… 40. Because there was a lack of water, many trees died rapidly. >> Because of……………………………………………………………………………………………… 41. She walked slowly because her leg was injured. >> Because of…………………………………………………………………