Neutral buoyancy diver maintains neutral buoyancy by continuous correction, usually by controlled breathing, as neutral buoyancy is an unstable condition for a compressible object in a liquid. The mathematician Archimedes discovered much of how buoyancy works more than 2000 years ago. In his research, Archimedes discovered that an object is buoyed up by a force equal to the weight of the water displaced by the object. In other words, an inflatable boat that displaces 100 pounds (45 kilograms) of water is buoyed up by that same weight of support. An object that floats in the water is known as being "positively" buoyant.
The Legend of Zelda: A Link to the Past The Legend of Zelda: A Link to the Past The Legend of Zelda: A Link to the Past is an action-adventure video game developed and published by Nintendo for the Super Nintendo Entertainment System video game console. It is the third installment in "The Legend of Zelda" series and was released in 1991 in Japan and 1992 in North America and Europe. The plot of "A Link to the Past" focuses on Link as he travels on a journey to save Hyrule, defeat Ganon and rescue maidens related to the Sages. "A Link to the Past" uses a 3/4 top-down