Why icebergs do not sink in sea water?
Iceberg - a huge block of ice, the floating in the oceans.
Where do icebergs come from?
Huge chunks of ice from ice breaking away, which cover continents and are started to float freely. For example, the northern icebergs break off from the Greenland ice sheet, and the south of Antarctica, and the southern icebergs in size is much higher than the northern. Not only on the properties of the iceberg existence depends on the duration and distance of his voyage, it also depends on factors such as the direction and speed in the ocean.
The largest in size and promorozhennaya down to -60C, the icebergs of Antarctica 'live' for many years, sometimes even decades. Then, as the Greenland icebergs are a bit smaller and the temperature of the deep freeze up to -30 ° C. They live much less and their term of melting is 2-3 years.
Ice is much lighter than water, this fact explains why, even the deep waters do not freeze completely in winter. If it were otherwise, then, in fact, the ice falling to the bottom would have driven to the surface of the lower layers of water, and gradually all the water in the lake would just froze. But, quite the opposite takes place when water freezes. At the time of the conversion of water into ice, its volume increases by about ten percent, and as a result the density of ice is much less than that of water. This somehow explains why ice floats on the surface.
at a considerable depth of the global ocean water temperature is below zero degrees, but the water does not freeze there. Construed this pressure, which constitute the upper water layers.
For the first time the question of why icebergs do not sink, said Mikhail Lomonosov. iceberg density - 920 kg / m ?. In addition, a lump of ice or an iceberg consists of fresh water and is separated from the ice shelves.
Due to the fact that the sea water is denser iceberg and sinks completely. And then it is important to know that floats on the water surface only his tenth part - the top, the rest - 90% of the blocks of ice hidden under the water.
Meeting him for the vessels on the high seas is dangerous. If the ship time will notice a moving iceberg, then a collision it can get very serious injury or even death.