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Float glass is a sheet of glass made by floating molten glass on a bed of molten metal of a low melting point, typically tin, [1] although lead was used for the process in the past. [2] This method gives the sheet uniform thickness and a very flat surface. [ 3 ]
A Japanese glass fishing float. Glass floats were used by fishermen in many parts of the world to keep their fishing nets, as well as longlines or droplines, afloat.. Large groups of fishnets strung together, sometimes 50 miles (80 km) long, were set adrift in the ocean and supported near the surface by hollow glass balls or cylinders containing air to give them buoyancy.
A float can collect data while it is neutrally buoyant or moving through the water column. Often, floats are treated as disposable, as the expense of recovering them from remote areas of the ocean is prohibitive; when the batteries fail, a float ceases to function, and drifts at depth until it runs aground or floods and sinks.
Use of float glass at Crystal Palace railway station, London. Float glass is a sheet of glass made by floating molten glass on a bed of molten metal, typically tin, although lead and various low melting point alloys were used in the past. This method gives the sheet uniform thickness and very flat surfaces. Modern windows are made
Both Physalia and Velella poses "sails", which allow them to travel based on wind direction. [15] These by-the-wind sailors float near the surface of the ocean with their tentacles hanging below in the water. Velella has a raised transparent "sail" on a blue oval disk. Short fringing tentacles hang below from the disc.
Flotsam / ˈ f l ɒ t s ə m / (also known as "flotsan") refers to goods from a sunken vessel that have floated to the surface of the sea, or any floating cargo that is cast overboard. [5] In maritime law, flotsam pertains to goods that are floating on the surface of the water as the result of a wreck or accident.
Once it fully sinks to the floor of the fluid or rises to the surface and settles, Archimedes principle can be applied alone. For a floating object, only the submerged volume displaces water. For a sunken object, the entire volume displaces water, and there will be an additional force of reaction from the solid floor.
The distribution of active floats in the Argo array, colour coded by country that owns the float, as of February 2018. Argo is an international programme for researching the ocean. It uses profiling floats to observe temperature, salinity and currents. Recently it has observed bio-optical properties in the Earth's oceans.