题干

(2015•菏泽)利用如图所示的生活用品,设计与压强相关的实验,完成下表

                                      

实验目的

工具

序号

操作(简述)

求证:大气压是存在的



液体压强与深度的关系



上一题 下一题 0.0难度 选择题 更新时间:2014-11-08 06:10:36

答案(点此获取答案解析)

解:

(1)在平板玻璃上洒少量水,把饮料瓶放在平板玻璃有水的地方,上提饮料瓶,玻璃板被提起.说明大气压的存在;

用锥子将灌满水的塑料瓶扎几个眼,水从眼里流出,把瓶盖盖上,则水不再从眼里流出,说明大气压的存在;

(2)用锥子在灌满水的塑料瓶不同高度处扎几个眼,下面眼中的水射得远,上面眼中的水射得近,说明液体内部的压强随深度的增加而增大.

故答案为:

A. How was it and who else (其他的) would you like to bake for?

B. What made you decide to write the book Bake Me a Story?

C. What is your favorite recipe from the book?

D. Do you have any advice (建议) for those who want to get into baking?

E. It takes so long to bake a cake, so do you feel unhappy when you see people eat it so quickly?