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Ballast is dense material used as a weight to provide stability to a vehicle or structure. Ballast, other than cargo , may be placed in a vehicle, often a ship or the gondola of a balloon or airship , to provide stability .
Track ballast is the material which forms the trackbed upon which railroad ties (UK: sleepers) are laid. It is packed between, below, and around the ties. [ 1 ] It is used to bear the compression load of the railroad ties, rails, and rolling stock ; to facilitate drainage ; and keep down vegetation that can compromise the integrity of the ...
An instant start ballast does not preheat the electrodes, instead using a relatively high voltage (~600 V) to initiate the discharge arc. It is the most energy efficient type, but yields the fewest lamp-start cycles, as material is blasted from the surface of the cold electrodes each time the lamp is turned on.
Ballast water discharge typically contains a variety of biological materials, including plants, animals, viruses, and bacteria. These materials often include non-native, nuisance, and exotic species that can cause extensive ecological and economic damage to aquatic ecosystems, along with serious human health issues including death.
Cross section of a vessel with a single ballast tank at the bottom. A ballast tank is a compartment within a boat, ship or other floating structure that holds water, which is used as ballast to provide hydrostatic stability for a vessel, to reduce or control buoyancy, as in a submarine, to correct trim or list, to provide a more even load distribution along the hull to reduce structural ...
The fragments then formed Bennu and other "rubble pile" asteroids - loose amalgamations of rocky material rather than solid objects. Early in its history, some of the ice inside the parent body ...
Find the proper cooking surface: Position your slow cooker on a flat, heat-resistant surface away from flammable materials. Avoid cooking under cabinet overhangs, as the rising steam from the ...
A railway track (CwthE and UIC terminology) or railroad track (NAmE), also known as permanent way (CwthE) [1] or "P Way" (BrE [2] and Indian English), is the structure on a railway or railroad consisting of the rails, fasteners, sleepers (railroad ties in American English) and ballast (or slab track), plus the underlying subgrade.
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