the foam's strength enabled the deepsea challenger designers to incorporate thruster motors as part of the infrastructure mounted within the foam but without the aid of a steel skeleton to mount various mechanisms. the foam supersedes gasoline-filled tanks for flotation as used in the historic bathyscaphe trieste.
a personal flotation device pfd; also referred to as a life jacket, life preserver, life belt, mae west, life vest, life saver, cork jacket, buoyancy aid or flotation suit is a piece of equipment designed to assist a wearer to keep afloat in water.the wearer may be either conscious or unconscious. pfds are available in different sizes to accommodate variations in body weight.
foam fractionation is a chemical process in which hydrophobic molecules are preferentially separated from a liquid solution using rising columns of foam. it is commonly used, albeit on a small scale, for the removal of organic waste from aquariums; these units are known as 'protein skimmers'.
an isolation tank, often referred to as a sensory deprivation tank also known as float tank, float pod, float cabin, flotation tank, or sensory attenuation tank is a pitch-black, light-proof, soundproof environment heated to the same temperature as the skin.flotation tanks are widely advertised as a form of alternative medicine, and beneficial health effects have been reported along with .
a pool noodle is a cylindrical piece of buoyant polyethylene foam, sometimes hollow. noodles are used by people of all ages while swimming. pool noodles are useful when learning to swim, for floating, for rescue reaching, in various forms of water play, and for aquatic exercise.the most common dimensions are about 160 centimetres 63 in in length and 7 centimetres 2.8 in in diameter.
sepiolite, also known as meerschaum / ˈ m ɪər ʃ ɔː m / meer-shawm, /-ʃ əm /-shəm; german: ˈmeːɐ̯ʃaʊm ; meaning 'foam of the sea' , is a soft white clay mineral, often used to make tobacco pipes known as meerschaum pipes .a complex magnesium silicate, a typical chemical formula for which is mg 4 si 6 o 15 oh 2 ·6h 2 o, it can be present in fibrous, fine-particulate .
an air mattress as might be used for temporary guest accommodation. an air mattress is an inflatable mattress/sleeping pad.. due to its buoyancy, it is also often used as a water toy/flotation device, and in some countries, including the uk, is called a lilo 'li-lo' being a specific trademark .
in 1988, the first u.s. ban of general polystyrene foam was enacted in berkeley, california. on july 1, 2015, new york city became the largest city in the united states to attempt to prohibit the sale, possession and distribution of single-use polystyrene foam the initial decision was overturned on appeal .
a defoamer or an anti-foaming agent is a chemical additive that reduces and hinders the formation of foam in industrial process liquids. the terms anti-foam agent and defoamer are often used interchangeably. strictly speaking, defoamers eliminate existing foam and anti-foamers prevent the formation of further foam.
syntactic foam sphere used as a subsurface float in oceanographic mooring. these materials were developed in early 1960s as improved buoyancy materials for marine applications. other characteristics led these materials to aerospace and ground transportation vehicle applications. .
a metal foam is a cellular structure consisting of a solid metal frequently aluminium with gas-filled pores comprising a large portion of the volume. the pores can be sealed closed-cell foam or interconnected open-cell foam . the defining characteristic of metal foams is a high porosity: typically only 5–25% of the volume is the base metal.
foam wonders. believe it or not, pool noodles have been around for almost 20 years. canada's industrial thermo polymers ltd. produced the first foam flotation device in 1988. since then, they have .
foam is an object formed by trapping pockets of gas in a liquid or solid.. a bath sponge and the head on a glass of beer are examples of foams. in most foams, the volume of gas is large, with thin films of liquid or solid separating the regions of gas. soap foams are also known as suds.. solid foams can be closed-cell or open-cell.in closed-cell foam, the gas forms discrete pockets, each .
the defender-class boat, also called response boat – small rb-s and response boat – homeland security rb-hs , is a standard boat introduced by the united states coast guard in 2002. the boats serve a variety of missions, including search and rescue, port security and law enforcement duties and replaces a variety of smaller non-standard boats. .
all motorboats and certain other boat types under 20 feet 6.1 m , manufactured for sale in the united states are required by law to have positive flotation, such that a completely swamped boat will still float. this is accomplished through the use of closed cell foam, or other non-permeable material. boston whaler, however, does claim to .