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Hace 21 horas · Host or black hole name. Solar mass ( Sun = 1 × 10 0 ) Notes. (Theoretical limit) 2.7×1011. This is the maximum mass of a black hole that models predict, at least for luminous accreting SMBH's. At around 10 10M☉, effects of both intense radiation and star formation in the accretion disc slow down black hole growth.
Hace 21 horas · 1st century AD: The aeolipile, a simple steam turbine is recorded by Hero of Alexandria. [263] 1st century AD: The first use of respiratory protective equipment is documented by Pliny the Elder ( c. 23 AD –79) using animal bladder skins to protect workers in Roman mines from red lead oxide dust.
Hace 21 horas · Alchemy (from Arabic: al-kīmiyā; from Ancient Greek: χυμεία, khumeía) [1] is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was historically practised in China, India, the Muslim world, and Europe. [2] In its Western form, alchemy is first attested in a number of pseudepigraphical texts ...
Hace 21 horas · Salvador [n 1] is a Brazilian municipality and capital city of the state of Bahia. Situated in the Zona da Mata in the Northeast Region of Brazil, Salvador is recognized throughout the country and internationally for its cuisine, music, and architecture. The African influence in many cultural aspects of the city makes it a center of Afro ...
Hace 21 horas · Pluto (mythology) In ancient Greek religion and mythology, Pluto ( Greek: Πλούτων, Ploutōn) was the ruler of the Greek underworld. The earlier name for the god was Hades, which became more common as the name of the underworld itself. Pluto represents a more positive concept of the god who presides over the afterlife.
Hace 21 horas · But last month, the head of Russia’s defense manufacturer, Rostec, Sergei Chemezov, said the Armata will not be deployed in Ukraine because of its high cost. “Of course, it is much superior to other tanks in terms of functionality, but it is too expensive,” Chemezov said, according to state media.
Hace 21 horas · Özellikle Safevîler’de hassa asker topluluğuna verilen ad. [34] İlk olarak İlhanlılarda, daha sonra Akkoyunlu ve Karakoyunlu devletlerinde kullanılmıştır. [34] Safevilerde ise şah'ın kraliyet muhafızı olarak biliniyorlardı . Korçular teorik olarak Kızılbaş aşiretlerinden askere alındı ve maaşlarını devlet hazinesinden ...
