自制“弯折铁片做功增加内能实验器”

• 作 者: 赵锦荣
• 机 构: 江苏省海门市开发区中学,
• 出 处: 实验教学与仪器
• 发表日期: 2015年06期
• 关键词: 自制 弯折 铁片 科技出版社 温度升高 热学原理 出版集团 测量温度 温度计 苏科版 全角度 机械功 逼近法 物理 铁丝 烫伤 手指 江苏 辐射 幅图

苏科版《物理》(9年级上册)(刘炳升、李容主编,江苏科技出版社、凤凰传媒出版集团出版,2007年6月第2版)第46页插入了一幅图(图12-25),该图描绘了铁丝被快速反复弯折做机械功使其温度升高的情节。笔者发现,除利用温度计测量温度(既不方便也无必要)外,从防烫伤等安全角度考虑,似乎只能以手指(中指指肚)逼近法,即凭借辐射感温法来证实、阐释或说明“做功增加内能”这一热学原理。

Su Ke version of Physics (Grade 9) (Liu Bingsheng, Li Rong editor, Jiangsu Science and Technology Press, published by Phoenix Media Group, June 2007 2nd Edition) page 46 inserted a picture (Figure 12-25 ), The figure depicts the wire is rapidly repeated bending mechanical work to make it the temperature rise of the plot. I found that, in addition to the use of thermometers to measure the temperature (neither convenient nor unnecessary), from the perspective of anti-scald and other security considerations, it seems that only the finger (middle finger belly) approximation method, that is, by means of radiation temperature to confirm, Explain “increase energy to do internal work ” the thermal principle.