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1 器材透明锥形玻璃瓶(或广口瓶、塑料瓶)一个,彩色小气球两个,橡皮塞一个,细玻璃管三根.2 制作方法先在选好的橡皮塞上打好三个通孔(孔径略小于细玻璃管),然后将三根玻璃管穿入,并在其中两根玻璃管的一端系紧气球.不系气球玻璃管两端开口,系气球的两根玻璃管,一根b管,其一端开口,另一根a管,其一端用橡皮膜(或塑料纸)封闭,如图1所示.3 实验与观察在锥形玻璃瓶中装满水,把装好玻璃管的塞子紧塞在瓶口(彩色小球浸在水中),当锥形瓶开口端向上
1 A transparent glass bottle (or jar, plastic bottle), two small colored balloons, one rubber stopper and three fine glass tubes. 2 Method of Making Three Through Holes on Selected Rubber Plugs (Aperture is slightly smaller than the thin glass tube), then three glass tubes are penetrated, and one end of two glass tubes are fastened to the balloon. The other is not the end of the balloon glass tube. The two glass tubes of the balloon are one b One end of the tube is open, and the other is a tube, one end of which is closed with a rubber membrane (or plastic paper), as shown in Fig. 1. 3 Experiment and observation Fill the water in the conical glass bottle and install the glass tube. The stopper is tightly plugged in the bottle mouth (colored balls dipped in water) when the open end of the conical bottle is up