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一般演示玻马定律需要测量压强,压强的测量则通常是用读玻璃管中水银高度差的方法。这样的实验在实验室可以得到精确的结果,但作为课堂的定性演示却不很方便,本文介绍一个有效、简易的装置。整个装置由一U型管和一木架组成(如图)。U型管二端开口,带颜色的水可以从管口注入,无疑此时管内水面高度应相等。再用一气球套住一个管口(气球现在不会鼓起),并用手指压住,如图(A)。把带颜色的水从另一端加入,学生可以看到随着水的加入,二管内水面
The general demonstration of Boltzmann's law requires the measurement of pressure and the measurement of pressure is usually the same as reading the height difference of mercury in the glass tube. Such experiments in the laboratory can get accurate results, but as a qualitative presentation in the classroom is not very convenient, this article describes an effective and simple device. The whole device consists of a U-tube and a wooden frame (Figure). U-shaped tube open at both ends, colored water can be injected from the nozzle, no doubt at this time the water level inside the tube should be equal. Then use a balloon to cover a nozzle (the balloon will not now bulge), and use your fingers to suppress, as shown in Figure (A). The colored water from the other end to join, students can see that with the addition of water, the two water surface