论文部分内容阅读
产生背景在初中物理教学十多年教坛上,对教学大纲和新课程标准改革要求进行了研究,受教课书中物理知识现象启发,联系实际生活,促发知识灵感。在九年级物理第十四内能的利用第1节《热机》中,在试管内装些水,用橡胶塞塞住管口,将水加热一段时间,观察现象。燃料燃烧时产生的热量传给水和水蒸气,塞子受到水蒸气的压力而冲出去,水蒸气的内能转化为塞子的动能。根据此原理,发明了蒸汽机。在生活中,常见到小城市夜色中节
Background In the teaching of physics for more than ten years in junior high school, the syllabus and new curriculum standards for the reform of the requirements were studied by the textbook inspired by the phenomenon of physical knowledge, contact with the actual life and promote knowledge and inspiration. In the ninth year of the physical use of the fourteenth energy «industry business Nineteenth in the physical use of the fourteenth energy In Section 1“ heat engine ”, in the test tube filled with water, rubber stopper plug nozzle, the water heated for some time to observe the phenomenon. The heat generated by the combustion of the fuel is transferred to the water and the steam. The plug is forced out by the pressure of the water vapor and the internal energy of the steam is converted into the kinetic energy of the plug. According to this principle, invented a steam engine. In life, it is common to small city night festival