# Icebergs

From a school bench we know of such an interesting object that meets in the ocean, like an iceberg - a huge freely floating piece ice. Icebergs have recently been increasingly mentioned in connection with the aggravation of the problem of pure fresh water. One possible way to solve this problem is to transport icebergs to consumers. So far, the project is very expensive, but real. True, you need to find out - and where should they be taken? How much water do they contain? Where can they swim by themselves? Let's try to consider these and not only these questions.

First, let's remember physics - density of ice at 00 C is 916,7 kg/m3, and the sea water is about 1030 kg/m3. What follows from this? A very simple fact - the iceberg is deeply submerged in water (up to 90% of the iceberg's volume is under water), so that the part visible over the water is only a small fraction of the entire iceberg.

The largest icebergs are found in Antarctica. These are huge islands, containing an incredible amount of fresh water. For example, in 1956 an iceberg with a length of 350 km and a width of 40 km was seen. In 1927, sailors near the South Shetland Islands met an iceberg with a length of 170 km and a height of almost 40 m. Considering that the visible part is only 1/10 of the entire volume of the iceberg, the mass of such an iceberg is truly enormous.

In the northern hemisphere, icebergs are more modest in size. The largest of them was recorded in 1882 near the Canadian island of Baffin Island. It was 10 km long and 5 km wide.

But the icebergs of the northern and southern hemisphere differ not only in size but also in shape. In the southern hemisphere, they have a table-shaped shape and steep edges, and in the northern hemisphere they are irregularly shaped. Therefore, the icebergs of the northern hemisphere have a height higher than the icebergs in the southern hemisphere - the highest northern iceberg had a height of 134 m.

Of course, apart from the possible benefits to mankind as a source of drinking water, icebergs are better known to mariners as a danger and cause of the death of many ships. The most famous is the incident that happened on the night of April 15, 1912 with the huge ocean passenger liner "Titanic", which during the transatlantic flight collided with an iceberg from Greenland. As a result of the strongest blow, a huge hole was formed, the ship split into two parts and sank in several hours in the waters of the North Atlantic. But "Titanic" was called unsinkable! Unfortunately, more than 1500 people died during the disaster. In 1985, 73 years after the death, the sunken parts of the ship were found by the expedition of the Massachusetts Oceanographic Institute at a depth of 3750 m. From 1985 to 2012, 17 expeditions were carried out to the wreckage of the Titanic, more than 5 thousands of items - from personal belongings of passengers to a 17-ton piece of skin.

With the improvement of navigational devices, collisions with the iceberg are extremely rare. And there are not that many icebergs in the ocean. In 1972, they established a record of their number in the North Atlantic - about 1600 pieces. Usually swims a lot less - no more than 200 pieces per year.

Under the influence of ocean currents, icebergs swim long distances. The iceberg came closest to the equator, the coordinates of which were 26 degrees south latitude and 26 degrees west longitude. In the northern hemisphere, icebergs can be found even at the latitude Bermuda Islands. Of course, the way of the iceberg is very much dependent on its size and the extent to which it will fall.

Of course, people have not yet learned how to manage the formation of icebergs. How to direct it to certain currents for delivery to the right places. But with the development of technology it will be possible and on the shelves of our stores next to artesian bottled water can be and water obtained from the iceberg.