polyethylene terephthalate sometimes written poly ethylene terephthalate , commonly abbreviated pet, pete, or the obsolete petp or pet-p, is the most common thermoplastic polymer resin of the polyester family and is used in fibres for clothing, containers for liquids and foods, thermoforming for manufacturing, and in combination with glass .
extraction and processing costs were lowered over technological progress and the scale of the economies. however, the need to exploit lower-grade poorer quality deposits and the use of fast increasing input costs above all, energy increased the net cost of aluminium; the real price began to grow in the 1970s with the rise of energy cost.
silicone is often confused with silicon, but they are distinct substances. silicon is a chemical element, a hard dark-grey semiconducting metalloid which in its crystalline form is used to make integrated circuits 'electronic chips' and solar cells. silicones are compounds that contain silicon, carbon, hydrogen, oxygen, and perhaps other .
galvanization or galvanizing also spelled galvanisation or galvanising is the process of applying a protective zinc coating to steel or iron, to prevent rusting.the most common method is hot-dip galvanizing, in which the parts are submerged in a bath of molten hot zinc.
silicon is an important constituent of electrical steel, modifying its resistivity and ferromagnetic properties. the properties of silicon may be used to modify alloys with metals other than iron. 'metallurgical grade' silicon is silicon of 95–99% purity.
carbon from latin: carbo 'coal' is a chemical element with the symbol c and atomic number 6. it is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds.it belongs to group 14 of the periodic table. three isotopes occur naturally, 12 c and 13 c being stable, while 14 c is a radionuclide, decaying with a half-life of about 5,730 years.
steel is an alloy of iron and carbon, and sometimes other elements like chromium. because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, trains, automobiles, machines, appliances, and weapons. iron is the base metal of steel.
because stainless steel is a poor conductor of heat, it is often used as a thin surface cladding over a core of copper or aluminium, which conduct heat more readily. citation needed cutlery is normally stainless steel, for low corrosion, ease of cleaning, negligible toxicity, as well as not flavoring the food by electrolytic activity.
vitamin c, also known as ascorbic acid and ascorbate, is a vitamin found in various foods and sold as a dietary supplement. it is used to prevent and treat scurvy. vitamin c is an essential nutrient involved in the repair of tissue and the enzymatic production of certain neurotransmitters.
petroleum is used mostly, by volume, for refining into fuel oil and gasoline, both important 'primary energy' sources. 84 percent by volume of the hydrocarbons present in petroleum is converted into energy-rich fuels petroleum-based fuels , including gasoline, diesel, jet, heating, and other fuel oils, and liquefied petroleum gas.
henry also known as henry hoover is a canister vacuum cleaner made and sold by numatic international.it is most notable for its human-like face on the body of the vacuum cleaner. the vacuum has several variations, including different names on the cap including 'hetty', 'harry' and 'james' as well as different models designed for different applications.
mining is the extraction of valuable minerals or other geological materials from the earth, from an ore body, vein or seam. the term also includes the removal of soil. materials recovered by mining include base metals, precious metals, iron, uranium, coal, diamonds, limestone, oil shale, rock salt, potash, construction aggregate and dimension .
in chemistry, a reactivity series or activity series is an empirical, calculated, and structurally analytical progression of a series of metals, arranged by their 'reactivity' from highest to lowest. it is used to summarize information about the reactions of metals with acids and water, double displacement reactions and the extraction of metals from their ores