【摘 要】
：
人教版九年级《物理》(2006年3月第3版)教科书中“物体内能的改变”一节,有两个演示实验说明做功可改变物体的内能。本人经多次实践,对这两个实验进行了一些改进,使之简单实
论文部分内容阅读
人教版九年级《物理》(2006年3月第3版)教科书中“物体内能的改变”一节,有两个演示实验说明做功可改变物体的内能。本人经多次实践,对这两个实验进行了一些改进,使之简单实用,在教学实践中取得了较好的教学效果。一、对内能增大的实验改进传统的实验是:用一小团蘸有乙醚的棉花来完成实
In the ninth-grade “Physics” of the People’s Education Press (3rd edition, March 2006), in the textbook “Changes in Energy within Objects”, there are two demonstration experiments that show that doing work can change the internal energy of an object. After several times of practice, I have made some improvements to these two experiments, making them simple and practical, and achieved good teaching results in teaching practice. First, the experimental improvement of the internal energy increase The traditional experiment is: use a small group of cotton with ether to complete
其他文献
Polycrystalline SrTiO3 thin films with the cubic perovskite structure were grown on quartz substrates by pulsed laser deposition. The first-order Raman scatteri
We report a new cosensitization utilizing quantum dot (QD) PbS and Cis-(SCN)2Bis(2,2-bipyridyl-4,4-dicarboxylate)ruthenium (N3) dye on the nanoporous TiO2 film.
一、提出客观建议,推动教技中心的成立rn首先,我们向县局领导提交了“关于学校成立教育技术中心的建议”.建议阐述了各级教育装备必须有一个机构来管理.过去,教育技术工作常
We investigate the absorption spectra, optical constants and thermal decomposition as well as red-light (650 nm)static recording properties of three novel nicke
Pentacene organic thin-film transistors using commercial photoresist as gate dielectrics were fabricated. The photoresist was spin-coated and directly patteed b
随着“两基”和“实验教学普及县”达标活动的深入开展,大多数中小学校建立了实验室,并配备了大批教学仪器。因此,如何加强实验室的管理,充分发挥其作用,促进实验教学水平提
选手表现只要是自然的、自由的、精彩的,不一定非要最后决出个金银铜铁锡来。刻意的设计和编排,总是难以截留喜新厌旧的受众。好多事情都这样,越吃力,越不讨好。一直坚持收看
一中始建于1913年,称潍县县立中学,迄今已有95的的办学历史.
We present a new periodic all-metal slow wave structure, a coaxial step-disc-loaded system and the dispersion characteristics of the structure.
目的构建牛Ⅱ型链球菌(Streptococcus bovis biotypeⅡ)van B2基因真核表达质粒,并在宫颈癌HeLa细胞中进行表达。方法以牛Ⅱ型链球菌基因组为模板,采用PCR法扩增van B2基因,