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世界上有名的死海能使人漂浮.为什么呢?要弄清这个问题,还得从死海的特定位置及海水的密度和浮力的关系谈起.死海是个内陆湖,它的水面比地中海海平面低362米,因此凡是流进那里去的河水再也流不出来.那个地方的阳光充足,气温高,湖面上的水分不断地被蒸发到空气中去,所以湖水中的盐分就变得很高,比普通海水高5倍左右.死海海水的密度达1.172克/厘米~3～1.227克/厘米~3,比人体的密度1.021克/厘米~3～1.097克/厘米~3要大,所以人掉到死海里,总是漂浮在水面上.
The world’s famous Dead Sea can make people floating. Why? To understand this problem, we must talk about the specific location of the Dead Sea and the relationship between the density and buoyancy of the sea. The Dead Sea is an inland lake, and its surface is 362 lower than the Mediterranean Sea level. m, so all the rivers flowing into it will no longer flow. The place is full of sunshine and high temperatures. The water on the lake is continuously evaporated into the air, so the salt in the lake becomes very high. Ordinary seawater is about 5 times higher. The density of Dead Sea seawater is 1.172g/cm~3~1.227g/cm~3, which is greater than the density of human body 1.021g/cm~3~1.097g/cm~3, so people fall into the sea. In the Dead Sea, it always floats on the water.