焦耳定律实验的改进

Improving the Joule law experiment

针对教材中关于焦耳定律的实验中的不足,对该实验做了相应的改进,将教材中的吸热物质煤油改为空气,通过空气的受热膨胀来演示焦耳定律,实验现象较为明显,并且改进后的装置,液面升高的情况能同时展现在学生面前,对比性较好.

To improve the efficiency of the Joule law experiment in teaching material, air is used as the thermonegative matter instead of kerosene to demonstrate Joule law, the phenomenon is obvious. Using the improved device, the rise of liquid surface can be observed simultaneously, the contrast character is better.