Yueyaquan – Lake surrounded by desert dunes
Yueyaquan – literally means “a half-moon lake”. The reservoir really has a crescent shape of 200 m long and 50 m wide. According to the Chinese legend, long ago in the place where it is located, general Li Kuang’s soldiers were so thirsty that they did not have the strength to march on. Then the general struck the sand so much with the sword that water spurted out of him, which gradually formed a crescent-shaped lake. Yueyaquan for at least 2,000 years is a unique oasis, surrounded by the desert dunes of Takla Makan.
It is provided with an underground source, and moisture strengthens its banks, protecting the lake from covering with sand. In the oasis area the amount of precipitation is negligible, therefore the lake gradually dries up. According to measurements carried out in the 60’s. The average depth of the lake was then about 5 meters, while in the deepest place the bottom was 7 meters below the surface. In the 90’s, the depth of the lake was only 90 – 130 cm. Tourists come to the oasis on camels. In a hot and dry desert climate, staying at the lake is refreshing. The oasis is even more surprising in the winter. When the surrounding dunes are scattered with a thin layer of snow.
Lake Baikal bottom – Russian mini-submarine Mir–2
Lake Baikal bottom – In July, 2008. Russian mini-submarine Mir–2 reached located at a depth of 1637 m the bottom of the Siberian Lake Baikal. It was the deepest immersion in fresh water in history. Lake Baikal contains 20% of the world‘s fresh water. The lake that formed approx. 20 million years ago, living approx. 1000 unique species of animals and plants. During immersion, scientists collected samples at different depths of the ecosystem so that they could determine the impact of global warming on the lake.
Water from well
Water from well – It comes with a small depth near the wells are often different factories, construction sites, flows into them rain water efflux fertilizers and other inputs used in agriculture. According to data from 2013. More than 90% of the wells contain tap water undrinkable.
Dirty water victims – 6000 people
Dirty water victims – According to the UN day. For simple diarrhea, caused by dirty water. There are dying 6000 people, 60% of deaths of children, under the age of five is also associated with poor water quality.
Piquancy measurement – Possible to indicate
Piquancy measurement – Before it became possible to indicate the exact amount of active substance in peppers by means of chemical analysis, the so-called used. Scoville Unit. It is the work of the American chemist Wilbur Scoville, who created it in 1912. The piquancy has been studied using a solution of water, sugar and chili extract. Then tasters tried out on how much you dilute solution, in order to piquancy entirely disappeared.
Sound speed under water
Sound speed under water – The sound propagates in water at a speed of nearly 1.5 kilometers per second. Five times faster than the speed of sound in air.
Rainbow forming ways – Meteorological phenomenon
Rainbow forming ways – It meteorological phenomenon, optical (photo-meteor). Being produced by the refraction of light rays in the water droplets in the atmosphere. Where it is distributed across all colors.
Double rainbow – From Earth looks like semicircle
Double rainbow – When viewed from Earth, rainbow looks like a semicircle, but the height can see the whole circle. Inside the drop may reach internal reflections rays. If the rays bounce off the drops twice come out at an angle of 51°. In this way, a so-called The secondary rainbow that appears above the main rainbow.
Oasis of the Seas – Keel was constructed in 2007
Oasis of the Seas – Keel cruise ship Oasis of the Seas was constructed on 12 November 2007. In the Finnish shipyard in Turku. Launching was held on 21.11.2008. To use it introduced 5.12.2009. And a year later the water was a sister ship Allure of the Seas. Gross tonnage of both vessels is 225 282 GT (1 GT = 2.8 m³). Allure of the Seas numbering 362 m in length is 50 mm longer than its sister ship. Both ships, which combines Caribbean from Port Everglades in Florida, are on board 6296 passengers and 2384 crew members.
Bluefin tuna – Cold-blooded fish
Bluefin tuna – Although the bluefin tuna (Thunnus thynnus) is a Actinopterygii fish, most of which are cold-blooded, their body is from 6 to 20 degrees Celsius warmer than the surrounding sea water. This heat is generated within the muscle – and with them, mainly built tuna.