buoyancy
91Space Systems Laboratory — Coordinates: 38°59′34.4″N 76°56′22.0″W / 38.992889°N 76.93944°W / 38.992889; 76.93944 …
92Cephalopod — Cephalopods Temporal range: Devonian – Recent[1] (Stem groups from Cambrian)[2] …
93Airship — For other uses, see Airship (disambiguation). Dirigible redirects here. For the 1931 film, see Dirigible (film). Not to be confused with Balloon (aircraft) or Blimp. Airship …
94Lyndon B. Johnson Space Center — Lyndon B. Johnson Space Center …
95Lighter than air — Some gases are buoyant in air because they have densities lower than that of air (about 1.2 kg/m3, 1.2 g/l). Lighter than air gases are used to fill craft called aerostats, which include free balloons, moored balloons, and airships, to make the… …
96Apparent weight — An object s weight, henceforth called actual weight , is the downward force exerted upon it by a gravitational field. By contrast, an object s apparent weight is the (usually upward) force (the normal force , or reaction force ), typically… …
97Convective available potential energy — A skew T plot showing a morning sounding with a large hydrolapse followed by an afternoon sounding showing the cooling which occurred in the mid levels resulting in an unstable atmosphere as surface parcels have now become negatively buoyant. The …
98Underwater diving — This article refers to underwater diving by humans. For other uses of the term diving, see dive and diving Underwater diving is the practice of going underwater with or without breathing apparatus. Recreational diving is a popular activity (also… …
99Davis Submerged Escape Apparatus — A Davis Submerged Escape Apparatus The Davis Submerged Escape Apparatus (also referred to as DSEA), was an early type of oxygen rebreather invented in 1910 by Sir Robert Davis, head of Siebe Gorman and Co. Ltd., inspired by the earlier Fleuss… …
100locomotion — /loh keuh moh sheuhn/, n. the act or power of moving from place to place. [1640 50; see LOCOMOTIVE, MOTION] * * * Any of various animal movements that result in progression from one place to another. Locomotion is classified as either… …
