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8 hours ago · Narwhals near the surface The narwhal is an agile and medium-sized whale. Adult males are around 4.1 m (13 ft) long from nose to tail tip, and females average 3.5 m (11 ft); the overall body length of 3.0 to 5.5 m (9.8 to 18.0 ft) is suggested for both males and females.
1 day ago · This list of islands by area includes all islands in the world larger than 2,500 km 2 (970 sq mi) and most of the islands over 1,000 km 2 (390 sq mi), sorted in descending order by area. For size and location reference, four very large continental landmasses are also shown.
8 hours ago · It is a massive, hot ball of plasma, inflated and heated by energy produced by nuclear fusion reactions at its core. Part of this energy is emitted from its surface as visible light, ultraviolet, and infrared radiation, providing most of the energy for life on Earth. The Sun has been an object of veneration in many cultures.
1 day ago · Slovakia's mostly mountainous territory spans about 49,000 square kilometres (19,000 sq mi), hosting a population exceeding 5.4 million. The capital and largest city is Bratislava, while the second largest city is Košice . The Slavs arrived in the territory of the present-day Slovakia in the 5th and 6th centuries.
8 hours ago · Exclusive economic zone. An exclusive economic zone ( EEZ ), as prescribed by the 1982 United Nations Convention on the Law of the Sea, is an area of the sea in which a sovereign state has exclusive rights regarding the exploration and use of marine resources, including energy production from water and wind. [1]
8 hours ago · Cholera ( / ˈkɒlərə /) is an infection of the small intestine by some strains of the bacterium Vibrio cholerae. [4] [3] Symptoms may range from none, to mild, to severe. [3] The classic symptom is large amounts of watery diarrhea lasting a few days. [2] Vomiting and muscle cramps may also occur. [3]
8 hours ago · The volume rate of flow of liquid through a source or sink (with the flow through a sink given a negative sign) is equal to the divergence of the velocity field at the pipe mouth, so adding up (integrating) the divergence of the liquid throughout the volume enclosed by S equals the volume rate of flux through S. This is the divergence theorem.
