full symmetry
51Nobel Prizes — ▪ 2009 Introduction Prize for Peace The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …
52physical science, principles of — Introduction the procedures and concepts employed by those who study the inorganic world. physical science, like all the natural sciences, is concerned with describing and relating to one another those experiences of the surrounding… …
53Supergravity — In theoretical physics, supergravity (supergravity theory) is a field theory that combines the principles of supersymmetry and general relativity. Together, these imply that, in supergravity, the supersymmetry is a local symmetry (in contrast to… …
54Guitar tunings — Guitar standard tuning, shown one octave higher than actual pitch. (E2.A2.D3.G3.B3.e4) Guitar tunings almost always refers to the pitch of the open ( unfretted ) string, though some tunings may only realistically be attained by the use of a capo… …
55subatomic particle — or elementary particle Any of various self contained units of matter or energy. Discovery of the electron in 1897 and of the atomic nucleus in 1911 established that the atom is actually a composite of a cloud of electrons surrounding a tiny but… …
56Molecular orbital — See also: Molecular orbital theory In chemistry, a molecular orbital (or MO) is a mathematical function describing the wave like behavior of an electron in a molecule. This function can be used to calculate chemical and physical properties such… …
57Polygon — For other uses, see Polygon (disambiguation). Some polygons of different kinds In geometry a polygon (   …
58arts, East Asian — Introduction music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature. Some studies of East Asia… …
59String theory — This article is about the branch of theoretical physics. For other uses, see String theory (disambiguation). String theory …
60Quantum chromodynamics — Standard model of particle physics Standard Model …
