“压强和浮力”创新训练题

• 作 者: 张霞
• 机 构: 河南省实验中学
• 出 处: 中学生数理化(初中版)
• 发表日期: 2005年10期
• 关键词: 创新训练 弹簧测力计 阿基米德原理 底面积 示数 作图题 初步结论 圈图 比较实验 重要启事

一、填空题 1.某同学喝软包装的冰红茶,用嘴快速吸 吸管,包装袭会变瘪.包装袋变瘪的原因是 2.狮子、鳄鱼的犬牙(图l)像锥子一样尖 锐,门牙像刀刃一般锋利,它们在猎食过程中 起的作用,我们身边有很多类似的事例. 滩鬓鹭 。主黔 请再举出一例: 3.如图2所示,平衡在钢丝上最低处的

First, fill in the blanks 1. Some students drink soft-packed iced tea, and quickly suck the mouth with a straw, and the packaging will change. The reason for the change in the packing bag is 2. The lion, crocodile’s canine teeth (Figure 1) is as sharp as the awl, incisors As the blades are generally sharp, they play a role in the hunting process. There are many similar cases around us. Please give another example: 3. As shown in Figure 2, balance the lowest point on the wire