Câu 9. Đun nóng vật từ 30oC lên 70oC thì độ tăng nhiệt độ của vật là: A. 30oC B. 40oC C. 70oC D. 100oC Câu 10. Câu nào dưới đây nói về nhiệt năng là không đúng? A. Nhiệt năng của vật thay đổi khi nhiệt độ của vật thay đổi. B. Nhiệt năng của vật là nhiệt lượng vật thu vào hay tỏa ra. C. Nhiệt năng của vật là tổng động năng của các phân tử cấu tạo nên vật. D. Nhiệt năng là một dạng năng lượng.

Các câu hỏi liên quan

a. Choose the word which has the underlined part pronounced differently from the rest(0.5m) 1. A. exhaust B. hour C. honest D. house 2. A. frightened B. stamped C. walked D. laughed b. Choose the correct answer to complete the sentences. (1m) 1. I think I _______ soccer with my friends this time next weekend. A. am going to play B. will be playing C. are playing D. was playing 2. After three hours of considering, we have decided _______ the final decision. A. making B. to make C. to making D. make 3. Good teachers usually have effective teaching.................. A. techniques B. technology C. science D. researcher 4. ....................I ask you a question? A. must B. will C. may D. do 5. The teacher _______ the students that they should make contribution to protecting the environment by saving paper and recycling things. A. said B.asked C. forced D. told 6. He................. in Da Lat for ten years by the end of this year. A. lives B. has lived C. is living D. will have lived PART C. READING I. Read this passage and answer the questions (1.0m) Thomas Edison was one of the greatest inventors of the world. He was responsible for more than one thousand inventions including the electric light bulb and the record player. He also created the world’s first industrial research laboratory. Edison was born in 1847 in Ohio, USA. When he was 10 years old, he set up a small laboratory after he had read a science book his mother showed him. In 1869, he borrowed some money and began to make inventions. In 1876 he built a new laboratory so that he could spend all his time inventing. He planned to turn out minor inventions every ten days and “big trick” every six months. He developed many devices that brought great benefits to people’s life. He once said that the value of an idea lay in the using of it. Edison died in 1931, after having aremarkably productive life. 1.Who was Thomas Edison? …………………………………………………………………………………………. 2.When and where was he born? …………………………………………………………………………………………. 3. What did he invent? …………………………………………………………………………………………. 4. Did he build a new laboratory in 1876? ………………………………………………………………………………………….