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4 unusual facts about buoyancy


Buoyancy

Calculation of the upwards force on a submerged object during its accelerating period cannot be done by the Archimedes principle alone; it is necessary to consider dynamics of an object involving buoyancy.

The magnitude of that force is proportional to the difference in the pressure between the top and the bottom of the column, and (as explained by Archimedes' principle) is also equivalent to the weight of the fluid that would otherwise occupy the column, i.e. the displaced fluid.

The buoyancy, in both cases, is equal to the weight of fluid displaced - Archimedes' principle holds for air just as it does for water.

Nahan

Nahan celebrates Bawan Dwadshi towards the end of the monsoon, when fifty-two cult images of local gods are carried in procession to Jagannath temple, where they are floated ceremoniously in a pool and are restored at midnight to their niches.


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Angelo Faticoni

Angelo Faticoni (1859 – August 2, 1931) was a professional freakshow artist and contortionist who was renowned for his unusual buoyancy.

Archimedean principle

Archimedes' principle, a principle relating buoyancy with displacement.

Cao Chong

According to Joseph Needham, although no official treatise in the likes of Archimedes' principle was ever written regarding buoyancy in ancient China, there were observational precedents of it in the Rites of Zhou, compiled and edited in the early Han Dynasty (202 BCE–220 CE).

Cossack pirates

The Chaikas were surrounded by reeds that helped in buoyancy and also provided extra protection against gunfire.

Extreme clipper

Owing to the depth and sharpness of their floors they lacked stability, and in consequence of the sharpness of the ends those parts did not have buoyancy enough to sustain their own weight—a fact which led to the straining and weakening of the vessel.

Life preserver

Personal flotation device, is piece of equipment designed to assist a wearer in keeping afloat; also referred to as a lifejacket, life preserver, Mae West, life vest, life saver, cork jacket, buoyancy aid, or flotation suit

Neutral buoyancy simulation as a training aid

Astronauts rehearse Extra-vehicular activity tasks in underwater neutral buoyancy before attempting those tasks in space to gain an understanding that they cannot use their weight to provide a force and that they may move or reposition themselves if they provide a propulsive force in any vector, either planned or inadvertent.

Standard diving dress

Borelli designed a dress that consisted of a metal helmet, a pipe to "regenerate" air, a leather suit, and a means of controlling the diver's buoyancy.

Static stability

Static stability (also called hydrostatic stability or vertical stability) — the ability of a fluid at rest to become turbulent or laminar due to the effects of buoyancy.

Underwater football

These include a 10-pound pool brick, a junior sized NFL-style football, and a junior sized basketball, all with negative buoyancy.


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