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About 12.0 ± 3.3 Tmol of O 2 per year today goes to the sinks composed of reduced minerals and gases from volcanoes, metamorphism, percolating seawater and heat vents from the seafloor. [27] On the other hand, 5.7 ± 1.2 Tmol of O 2 per year today oxidizes reduced gases in the atmosphere through photochemical reaction. [ 27 ]
Kursk was a Project 949A Antey (Oscar II-class) submarine, twice the length of a 747 jumbo jet, and one of the largest submarines in the Russian Navy.. On the morning of 12 August 2000, Kursk was in the Barents Sea, participating in the "Summer-X" exercise, the first large-scale naval exercise planned by the Russian Navy in more than a decade, and also its first since the dissolution of the ...
German submarine U-864. German submarine. U-864. German submarine U-864 was a Type IXD2 U-boat of Nazi Germany 's Kriegsmarine in World War II. On 9 February 1945, she became the only submarine in history to be sunk by an enemy submarine while both were submerged. U-864 was sunk by the British submarine HMS Venturer, and all 73 men on board died.
The 2,632-gross register ton steel-hulled screw steamer sank after colliding in thick fog with the screw steamer Nacoochie ( United States) 3 ⁄ 8 mile (0.60 km) south west the Vineyard Sound Lightship in 15 fathoms (90 ft; 27 m) of water off Vineyard Haven, Massachusetts. wreck partially removed between 6 September and 11 October increasing ...
A black hole is a region of spacetime wherein gravity is so strong that no matter or electromagnetic energy (e.g. light) can escape it. [2] Albert Einstein 's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. [3][4] The boundary of no escape is called the event horizon.
March 25, 1999 [1] The Three Mile Island accident was a partial nuclear meltdown of the Unit 2 reactor (TMI-2) of the Three Mile Island Nuclear Generating Station on the Susquehanna River in Londonderry Township, near Harrisburg, Pennsylvania. The reactor accident began at 4:00 a.m. on March 28, 1979, and released radioactive gases and ...
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