gravity heating
71Thermosiphon — (alt. thermosyphon) refers to a method of passive heat exchange based on natural convection which circulates liquid in a vertical closed loop circuit without requiring a conventional pump. Its intended purpose is to simplify the pumping of liquid …
72Coffee preparation — For the agricultural and industrial processes for producing whole coffee beans, see Coffee processing. Coffee preparation is the process of turning coffee beans into a beverage. While the particular steps needed vary with the type of coffee… …
73Exploration of Jupiter — Jupiter as seen by the space probe Cassini. This is the most detailed global color portrait of Jupiter ever assembled …
74Supermarine Spitfire (early Merlin powered variants) — Infobox Aircraft name =Spitfire type =Fighter manufacturer =Supermarine caption =Spitfire Vc launching from USS Wasp designer =R. J. Mitchell first flight =5 March 1936 introduction =1938 retired =1955, RAF status = primary user =Royal Air Force… …
75Dawn (spacecraft) — Dawn Artist s concept of Dawn with Vesta (left) Ceres (right) (the proximity of Vesta to Ceres is not to scale.) Operator NASA Major contractors Orbital Sciences, JPL, UCLA …
76Atmospheric wave — An atmospheric wave is a periodic disturbance in the fields of atmospheric variables (like surface pressure or geopotential height, temperature, or wind velocity) which may either propagate ( traveling wave ) or not ( stationary wave ).… …
77Ultraviolet (film) — Infobox Film name = UltraViolet caption = Promotional poster for the film UltraViolet director = Kurt Wimmer writer = Kurt Wimmer starring = Milla Jovovich Cameron Bright Nick Chinlund producer = John Baldecchi Lucas Foster Tony Mark (Executive)… …
78Germany — /jerr meuh nee/, n. a republic in central Europe: after World War II divided into four zones, British, French, U.S., and Soviet, and in 1949 into East Germany and West Germany; East and West Germany were reunited in 1990. 84,068,216; 137,852 sq.… …
79Variable Specific Impulse Magnetoplasma Rocket — Artist s impression of several VASIMR engines propelling a craft through space The Variable Specific Impulse Magnetoplasma Rocket (VASIMR) is an electro magnetic thruster for spacecraft propulsion. It uses radio waves to ionize and heat a… …
80Basement — This article is about the section of a building. For other uses, see Basement (disambiguation). An unfinished basement used for storage and exercise equipment …
