dropping curve
81Faster-than-light — (also superluminal or FTL) communications and travel refer to the propagation of information or matter faster than the speed of light. Science fiction style space travel, dubbed true FTL, defies known physics.Under the special theory of… …
82Guitar — Infobox Instrument name=Guitar names= classification=String instrument (plucked, nylon stringed guitars usually played with fingerpicking, and steel , etc. usually with a pick.) range= (a regularly tuned guitar) related=*Bowed and plucked string… …
83Demographics of Georgia (country) — Georgia: Total population with (top blue curve) and without (bottom red curve) Abkhazia and South Osetia, in millions. Data from statistical yearbooks of Georgian SSR (before 1990) and Georgia (after 1990), various years. The Demographics of… …
84Pi — This article is about the number. For the Greek letter, see Pi (letter). For other uses, see Pi (disambiguation). The circumference of a ci …
85Time travel — This article details time travel itself. For other uses, see Time Traveler. Time travel is the concept of moving between different moments in time in a manner analogous to moving between different points in space, either sending objects (or in… …
86White dwarf — For other uses, see White dwarf (disambiguation). Image of Sirius A and Sirius B taken by the Hubble Space Telescope. Sirius B, which is a white dwarf, can be seen as a faint pinprick of light to the lower left of the much brighter Sirius A …
87Wildebeest — This article is about the animal. For other uses, see Wildebeest (disambiguation). Gnu redirects here. For other uses, see Gnu (disambiguation). Wildebeest Blue Wildebeest, Ngorongoro Crater, Tanzania …
88Philosophiæ Naturalis Principia Mathematica —   Title page of Principia , first edition (1687) Original title …
89Stall (flight) — For other uses, see stall. In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack increases. This occurs when the critical angle of attack of the foil is exceeded. The critical angle of attack is… …
90Crumhorn — This article is about the musical instrument. For the district in East Frisia, North Germany, see Krummhörn. Crumhorns shown in the “Syntagma Musicum” Vol. 2 (1619) …
