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yi ge jian dan yi zuo xiao guo ming xian de shi yan jiang nei neng zhuan hua wei ji xie neng shi yan de gai jin
Author(s): 
Pages: 32
Year: Issue:  4
Journal: Experiment and Equipment for Primary School

Abstract: 1 前言 苏科版物理9年级上册P50活动12.7“观察点火爆炸现象——将内能转化为机械能”的实验中,使用电子式火花发生器点燃酒精,由酒精燃烧生成的高温高压的燃气对塑料盒盖做功,如图1所示,说明内能可以转化为机械能. 2 原实验不足之处 该实验的实验器材较难准备,而且实验有一定的危险性,所以绝大多数教师上课时都不做这个实验,而是用改进实验来代替,如图2所示.
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