论文部分内容阅读
现在有一个问题:在一艘航行在太平洋的游船上,导航员称游船正航行在地球上最深的水域——马里亚纳海沟.这时,一位游客不小心把一颗重5千克的水晶球掉进了海里.请问:这颗水晶球大概要花多长时间沉到海底?你能试着解答吗?很多同学会摇头:马里亚纳海沟的深度和水晶球在海水中下降的速度都不知道,怎么能得出结果?其实大部分人在想到这两个关键条件时,已经与解题突破口相距不远了,再进行一些合理的推
Now there is a problem: on a cruise ship sailing in the Pacific Ocean, the navigator says the cruise ship is sailing in the deepest part of the world’s waters - the Mariana Trench. At this time, a tourist carelessly put a weighing 5 kg of crystal The ball fell into the sea. Excuse me: How long will this crystal ball sink into the sea? Can you try to solve it? Many students shook their heads: the depth of the Mariana Trench and the speed at which the crystal ball descended Do not know, how can we come to the result? In fact, most people think of these two critical conditions, and the problem has not been far from the breach, and then make some reasonable push