cyclic motion
111Time standard — A time standard is any officially recognized specification for measuring time: either the rate at which time passes; or points in time; or both. For example, the standard for civil time specifies both time intervals and time of day. A time scale… …
112End time — End time, End times, or End of days are the eschatological writings in the three Abrahamic religions and in doomsday scenarios in various other non Abrahamic religions. In Abrahamic religions, End times are often depicted as a time of tribulation …
113Heat death of the universe — For the album, see The Heat Death of the Universe. Physical cosmology Universe  …
114chemical bonding — ▪ chemistry Introduction any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …
115Sunspot — A sunspot is a region on the Sun s surface (photosphere) that is marked by intense magnetic activity, which inhibits convection, forming areas of reduced surface temperature. They can be visible from Earth without the aid of a telescope. Although …
116Thompson submachine gun — Tommy gun redirects here. For other uses, see Tommy gun (disambiguation). For the Anti Aircraft gun nicknamed Chicago Piano, see 1.1 /75 caliber gun. Thompson Submachine Gun, Caliber .45 Wartime production variant …
117Langton's ant — after 11000 steps. A red pixel shows the ant s location. Langton s ant is a two dimensional Turing machine with a very simple set of rules but complicated emergent behavior. It was invented by Chris Langton in 1986 and runs on a square lattice of …
118Michael reaction — The Michael reaction or Michael addition is the nucleophilic addition of a carbanion or another nucleophile[1][2][3] to an alpha, beta unsaturated carbonyl compound. It belongs to the larger class of conjugate additions. This is one of the most… …
119Oerlikon 20 mm cannon — A modern Oerlikon cannon (Oerlikon 20mm/85 KAA) on a Royal Navy warship Type Autocannon Place of origin …
120Abiogenesis — Primordial soup redirects here. For the board game, see Primordial Soup (board game). Origin of life redirects here. For views on the origins of life outside the natural sciences, see Creation myth. Pre Cambrian stromatolites in the Siyeh… …
