Search results
18 hours ago · Spirituals (also known as Negro spirituals, African American spirituals, [1] Black spirituals, or spiritual music) is a genre of Christian music that is associated with African Americans, [2] [3] [4] which merged varied African cultural influences with the experiences of being held in bondage in slavery, at first during the transatlantic slave trade [5] and for centuries afterwards, through ...
18 hours ago · Rock. Rock is a broad genre of popular music that originated in the United States, but also in United Kingdom, in the late 1950s and early 1960s, developing a lot of subgenres, including heavy metal and punk rock. It has its roots in 1940s and 1950s rock and roll, a style that drew directly from the genres of blues, rhythm and blues, and from ...
18 hours ago · Kentucky (1908) Brown v. Board of Education of Topeka, 347 U.S. 483 (1954), [1] was a landmark decision of the U.S. Supreme Court ruling that U.S. state laws establishing racial segregation in public schools are unconstitutional, even if the segregated schools are otherwise equal in quality. The decision partially overruled the Court's 1896 ...
18 hours ago · The name is an analogy with the potential energy U = qφ, which is the energy due to the interaction of the particle with the electromagnetic fields. These quantities form a four-vector, so the analogy is consistent; besides, the concept of potential momentum is important in explaining the so-called hidden momentum of the electromagnetic fields.
18 hours ago · Planck's law describes the unique and characteristic spectral distribution for electromagnetic radiation in thermodynamic equilibrium, when there is no net flow of matter or energy. [ 2 ] Its physics is most easily understood by considering the radiation in a cavity with rigid opaque walls.
18 hours ago · Enrico Fermi (1901–1954) The Fermi paradox is a conflict between the argument that scale and probability seem to favor intelligent life being common in the universe, and the total lack of evidence of intelligent life having ever arisen anywhere other than on Earth. The first aspect of the Fermi paradox is a function of the scale or the large ...
18 hours ago · Peru. Peru, [e] officially the Republic of Peru, [f] is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pacific Ocean. Peru is a megadiverse country with habitats ranging from the arid plains of ...
