first oscillation
81Speed wobble — Wobble, shimmy, tank slapper, speed wobble, and even death wobble are all words and phrases used to describe a quick (4 10 Hz) oscillation of primarily just the steerable wheel(s) of a vehicle. The rest of the vehicle remains mostly unaffected.… …
82Fleming valve — schematic from US Patent 803,684. The Fleming valve, also called the Fleming oscillation valve, was a vacuum tube diode invented by John Ambrose Fleming and used in the earliest days of radio communication. As the first vacuum tube, the IEEE has… …
83spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
84creation myth — or cosmogony Symbolic narrative of the creation and organization of the world as understood in a particular tradition. Not all creation myths include a creator, though a supreme creator deity, existing from before creation, is very common. Myths… …
85Outline of meteorology — See also: Index of meteorology articles Eye of Hurricane Isabel from the International Space Station, September 15, 2003. Meteorology is the interdisciplinary scientific study of the atmosphere that focuses on weather processes and forecasting.… …
86Crystal oscillator — A miniature 4 MHz quartz crystal enclosed in a hermetically sealed HC 49/US package, used as the resonator in a crystal oscillator. A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal …
87solids, mechanics of — ▪ physics Introduction science concerned with the stressing (stress), deformation (deformation and flow), and failure of solid materials and structures. What, then, is a solid? Any material, fluid or solid, can support normal forces.… …
88sound recording — Introduction transcription of vibrations in air that are perceptible as sound onto a storage medium, such as a phonograph disc. In sound reproduction the process is reversed so that the variations stored on the medium are converted back… …
89Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun …
90Climate change in Australia — Climate change has become a major issue in Australia due to drastic climate events since the turn of the 21st century that have focused government and public attention.[1] Rainfall in Australia has increased slightly over the past century,… …
