制作潜水艇模型

制作潜水艇模型 6.制作潜水艇模型 [设计目的] 加深学生对物体的浮沉条件的理解。 [活动形式] 制作。 [活动准备] 每个活动小组准备如下器材:一次性注射针筒1只，一次性输液用透明软管1根(也可用细的软胶管)，塑料眼药水瓶1只，细铁丝若干，小刀1把，大口玻璃杯1个，水若干。 [活动过程] 1.制作 2(1)用小刀在塑料眼药水瓶距底部1.2厘米处开一个1×1cm的小孔(图6-1)。 (2)在眼药水瓶的两端缠绕细铁丝(图6-2)。 (3)用软管两端分别连注射针筒和眼药水瓶，连接处不能漏气(图6-3)。 2.调试 (1)在大口玻璃杯里放大半杯水。 (2)把针筒活塞抽出，使针筒内充满空气。 图6-1 图6-2 图6-3 (3)把连接好的眼药水瓶(潜水艇模型)放入杯中，让小瓶沉入水底。 (4)用针筒向眼药水瓶内充气，把水从开口处排出，眼药水瓶上浮;再用针筒把眼药水瓶内空气抽出，眼药水瓶下沉。 利用针筒向眼药水瓶内充气或抽气，眼药水瓶在水中浮沉自如，潜水艇模型制作成功。 [有关说明] four promoting increased effectiveness" for theme of cadres directly contact masses system, real put for people pragmatic clean requirements implementation to specific work in the. Foster and carry forward the party's fine style, so that the majority of party members and cadres and reinforcing the concept of public interest, grass roots and the masses, carry out extensive research, grasp the actual situation 1.在眼药水瓶上开孔时，可以先开一小孔，在调试时可以适当加大，孔要平滑些。 2.眼药水瓶上缠绕细铁丝的多少，以小瓶进满水后刚好下沉为好，通过加减铁丝，可以控制模型的浮沉速度。 four promoting increased effectiveness" for theme of cadres directly contact masses system, real put for people pragmatic clean requirements implementation to specific work in the. Foster and carry forward the party's fine style, so that the majority of party members and cadres and reinforcing the concept of public interest, grass roots and the masses, carry out extensive research, grasp the actual situation four promoting increased effectiveness" for theme of cadres directly contact masses system, real put for people pragmatic clean requirements implementation to specific work in the. Foster and carry forward the party's fine style, so that the majority of party members and cadres and reinforcing the concept of public interest, grass roots and the masses, carry out extensive research, grasp the actual situation