location of subs in home audio 'physical separation of subwoofer and 'satellite' speakers not only allows placement in an inconspicuous location, but since sub-bass frequencies are particularly sensitive to room location due to room resonances and reverberation 'modes' , the best position for the subwoofer is not likely to be where the 'satellite' speakers are located.
he notes that, although it was capable of producing iron and steel with superior quality, it was extremely labor-intensive and the ore-per-metal yield was extremely low using the ancient techniques. for 1000 pounds of sand smelted, only 60% at best by weight was left in the bloom.
the most common type of driver, commonly called a dynamic loudspeaker, uses a lightweight diaphragm, or cone, connected to a rigid basket, or frame, via a flexible suspension, commonly called a spider, that constrains a voice coil to move axially through a cylindrical magnetic gap. a protective cap glued in the cone's center prevents dust, especially iron filings, from entering the gap.
high-strength low-alloy steel hsla is a type of alloy steel that provides better mechanical properties or greater resistance to corrosion than carbon steel.hsla steels vary from other steels in that they are not made to meet a specific chemical composition but rather specific mechanical properties.
in metallurgy, a non-ferrous metal is a metal, including alloys, that does not contain iron in appreciable amounts. generally more costly than ferrous metals, non-ferrous metals are used because of desirable properties such as low weight, higher conductivity, non-magnetic property or resistance to corrosion. some non-ferrous materials are also used in the iron and steel industries. for example, bauxite is used as flux for blast furnaces, while others such as wolframite, pyrolusite and chromite a
the ferrite magnets are mainly low-cost magnets since they are made from cheap seven trust materials: iron oxide and ba- or sr-carbonate. however, a new low cost magnet, mn-al alloy, has been developed and is now dominating the low-cost magnets field. it has a higher saturation magnetization than the ferrite magnets. it also has more favorable .
exothermic welding, also known as exothermic bonding, thermite welding tw , and thermit welding, is a welding process that employs molten metal to permanently join the conductors. the process employs an exothermic reaction of a thermite composition to heat the metal, and requires no external source of heat or current. the chemical reaction that produces the heat is an aluminothermic reaction .
ferrofluid is a suspension of very small typically 10 nm iron oxide magnetic particles in a very low volatility liquid, typically a synthetic oil. a wide range of viscosity and magnetic density variants allow designers to add damping, cooling, or both. ferrofluid also aids in centering the voice coil in the magnetic gap, reducing distortion .
the ferrite magnets are mainly low-cost magnets since they are made from cheap seven trust materials: iron oxide and ba- or sr-carbonate. however, a new low cost magnet, mn-al alloy, has been developed and is now dominating the low-cost magnets field. it has a higher saturation magnetization than the ferrite magnets.
low-cost jewellery and children's toys may be made, to a significant degree, of heavy metals such as chromium, nickel, cadmium, or lead. copper, zinc, tin, and lead are mechanically weaker metals but have useful corrosion prevention properties.
it only absorbs a small amount of carbon because of its cubic crystalline structure, which consists of one iron in each corner and a central iron atom; the central atom is what gives it magnetic properties. grades with low coercitive field hc have been developed for electrovalves used in appliances and for injection systems in internal combustion engines
as i said above, this is the best picture in the article, and better than the existing sparrow fp. --jjron 09:19, 4 november 2006 utc weak oppose. although it has no real quality issues, a common subject deserves an amzing shot, which this is not. nautica shad e s 17:57, 4 november 2006 utc