upward-traveling
111Supercavitation — is the use of cavitation effects to create a large bubble of gas inside a liquid, allowing an object to travel at great speed through the liquid by being wholly enveloped by the bubble. The cavity (the bubble) reduces the drag on the object and… …
112Kukishin-ryū — infobox koryu nationality = Traditional Japanese martial art school = Kukishin ryū (九鬼神流) imagecaption = The original Kanji for the name. Notice that the Chinese character 鬼 (oni demon) replaces the older kokuji character. The hornless version is …
113Speed of sound — Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time. In SI Units with dry air at 20 °C (68 °F), the speed of sound is 343 m/s. This… …
114Whistler (radio) — A Whistler is a very low frequency electromagnetic (radio) wave generated by lightning. Frequencies of whistlers are 1 to 30 kHz, with maximum usually at 3 to 5 kHz. Although they are electromagnetic waves, they occur at audio frequencies, and… …
115Origins of the American Civil War — For events following South Carolina s declaration of secession from the Union, see Battle of Fort Sumter and American Civil War. The Battle of Fort Sumter was the first stage in a conflict that had been brewing for decades. The main explanation… …
116Pico de Orizaba — Pico de Orizaba, looking northwest from Fortín de las Flores, Veracruz Elevation …
117Water rocket — A water rocket is a type of model rocket using water as its reaction mass. The pressure vessel mdash;the engine of the rocket mdash;is usually a used plastic soft drink bottle. The water is forced out by a pressurized gas, typically compressed… …
118Suicide methods — Suicide …
119Messinian salinity crisis — Events of the Cenozoic view • discuss •  …
120Space music — Space music, also spelled spacemusic, is an umbrella term used to describe music that evokes a feeling of contemplative spaciousness. In fact, almost any music with a slow pace and space creating sound images could be called spacemusic. Stephen… …
