hill-spacing
61Saffron — For other uses, see Saffron (disambiguation). Saffron crocus …
62Milpitas, California — City of Milpitas   City   Milpitas City Hall …
63Antenna (radio) — Whip antenna on car …
64Modular connector — This article is about modular connectors. For the registered jack (RJ) wiring standard, see registered jack. Left to right, modular connectors: 8P8C plug, 6P6C plug, 6P4C plug, 4P4C plug, 6P6C jack …
65Sierra Leone — Sierra Leonean /lee oh nee euhn/. /lee oh nee, lee ohn / an independent republic in W Africa: member of the Commonwealth of Nations; formerly a British colony and protectorate. 4,891,546; 27,925 sq. mi. (72,326 sq. km). Cap.: Freetown. * * *… …
66Timeline of computing hardware 2400 BC–1949 — History of computing Hardware before 1960 Hardware 1960s to present Hardware in Soviet Bloc countries Artificial intelligence Computer science Operating systems Programming languages …
67Frequency modulation — See also: Amplitude modulation In telecommunications, frequency modulation (FM) conveys information over a carrier wave by varying its frequency (contrast this with amplitude modulation, in which the amplitude of the carrier is varied while its… …
68Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge …
69Atomic radius — Diagram of a helium atom, showing the electron probability density as shades of gray. The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the nucleus to the boundary of the… …
70Vernier scale — A vernier scale is an additional scale which allows a distance or angle measurement to be read more precisely than directly reading a uniformly divided straight or circular measurement scale. It is a sliding secondary scale that is used to… …
