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在医院里,我们经常会看到医生给病人打滴流.滴流的原理,用高中的物理知识是完全可以说明的.下面按照打滴流的操作步骤,分析如下.如图1所示,滴流瓶里的药液没有装满,上部留有一点空间充满稀薄空气(真空灌装) ,其气压小于大气压p0 .当输液管的针扎入瓶盖里时,有一小部分的空气将
In the hospital, we often see doctors trickling patients. The principle of drip flow, using the physical knowledge of high school, is completely clarified. The following are the steps to follow the drip flow. The analysis is as follows. As shown in Figure 1, The liquid in the drip bottle is not full, and there is a little space in the upper part filled with thin air (vacuum filling), and the air pressure is less than the atmospheric pressure p0. When the needle of the infusion tube plunges into the bottle cap, a small amount of air will