论文部分内容阅读
本文就高三物理总复习,着重探索如何切实提高学生能力,谈几点具体做法。一、探究隐含关系式——横向联系的纽带关于两种运动量度的争论,持续了近200年。现在我们当然都十分清楚,动量是力的时间累积效应,动能是力的空间累积效应,简言之,两者分别从不同侧面描写力和运动的关系。在复习教学中,我通过实例把两者有机地结合起来。例:两价离子在90伏的电压下,从静止被加速后,测出它的动量是1.24×10~(-21)千克·米/秒,这种离子的质量是多大? 学生解:∵p=mυ,∴m=p/υ,
In this paper, we will review the overall physics of the third year, focus on exploring how to effectively improve the students’ ability, and discuss some specific practices. I. Inquiry into Implicit Relationships - The Ties of Horizontal Connections The debate over two kinds of exercise measures lasted for nearly 200 years. Now, of course, we are all very clear that momentum is the time cumulative effect of force. Kinetic energy is the spatial cumulative effect of force. In short, both describe the relationship between force and movement from different sides. In reviewing teaching, I used the example to organically combine the two. Example: When the two-valent ion is accelerated from standstill at a voltage of 90 volts, its momentum is measured to be 1.24×10–21 kg·m/s. What is the mass of this ion? p=mυ,∴m=p/υ,