Copper cabling is the less expensive of the two to install. Copper wiring is flexible when installing so incase a technician has to bend it around a wall or at a certain angle to reach it to an end point, the cable can handle it. Also equipment to support copper wiring is relatively inexpensive to run. Copper cabling has been around ever since electricity was discovered and utilized in a day-to-day fashion. It was used mainly for telephone lines in the beginning of its life.
CHEMISTRY OF COPPER Introduction Copper is a chemical element with the symbol Cu and atomic number 29. It is a ductilemetal with very high thermal and electrical conductivity. Pure copper is soft and malleable; an exposed surface has a reddish-orange tarnish. It is used as a conductor of heat and electricity, a building material, and a constituent of various metal alloys. Copper was the first metal mined and crafted by man, and has been the most important one in the oldest times of history, because it was available in great quantities and was initially extractable almost at the surface of ground.
Commodity Chain Essays: Apple Iphone 5 Part 1: Extraction One raw material that is an integral component in finished Iphone 4 product like I have here is Columbite-Tantalite or as it is commonly referred to "Coltan" is a dull black metallic ore capable of holding a high electrical charge. An ore is a type of rock that contains minerals with important elements including metals. Ores are traded internationally and comprise a large portion of the international market in raw materials, examples of well known ores with significant value are the metals Gold and Copper. In Coltan the desired minerals within the ore are Columbite, and Tantalite. Columbite is valued for being comprised of the element niobium, and Tantalite for containing the element tantalum.
Fluorine April 6th, 2011 Fluorine is the most reactive chemical element and the lightest member of the halogen elements. Fluorine is a nonmetal and is part of group 17 (group VIIa) of the periodic table. Its density is 0.001696 grams per cubic centimeter. Its chemical activity can be attributed to its extreme ability to attract and to the small size of its atoms. Fluorine is a corrosive pale yellow gas.
2-propanol (bp=82 degrees C) 3. tetrahydofuran (bp=65 degrees C) 4. 1-butanol (bp=118 degrees C) 5. butanone (bp=80 degrees C) Give a better separation for the mixture to be distilled tetrahydofuran (bp=65 degrees C) because it is farthest from 100 degrees C Which alkyl halide would react fastest in a nucleophilic substitution using silver nitrate in ethanol (weak nucleophile, protic solvent)? 3-bromo-3-methylpentane (most
Gold is also highly malleable and ductile which means it is able to be hammered into many shapes and can be drawn into long thin wires. The colour of this metal, a butter yellow with a metallic lustre, attracts many and is one of its most common recognised characteristics. Gold also has great infared reflectivity and has very low reactivity while in the presence of other elements. Gold’s resistance to corrosion is also what makes this metal so durable. 2.
The round piece of zinc is not displacing its weight in water for it not to sink. A ship in the other hand is far heavier and has the ability to displace a heavier amount of water than it weights. The slope of equation will be very close to the density of lead which is 11.3g/ml. Graphing the densities shows me how much more denser than iodine the difference in the char the line for lead is much more higher than the iodine line. The amount of water displacement is much more with lead the zinc.
I can be found lining the cavities of spherically-shaped, hollow stones called geodes, which are prettier than rocks, or hanging out with my good friends Granite, Granitic Pegmatite, Syenite, Quartz, Dolomite, Calcite, Barite, Pyrite, Galena, Sphalerite, and Cassiterite . My streak is white, but it’s better than having no streak at all, like rocks. These are all of the best reasons why fluorites are better than dusty old rocks, but now I’ll tell you a little about why all minerals are better than rocks. Minerals are usually shiny or glassy. We sometimes have crystals embedded between out smooth layers.
Solids: Creating Synthetic diamonds Synthetic diamonds are lab made replications that are as real as any diamond found in the earth. They are most commonly used for industrial applications as they are generally harder than natural diamonds and are less commercially valued than natural diamonds. Synthetic diamonds have been in existence since the late 19th century yet only in recent modern times has the practice been perfectly for practical use. Synthetic diamonds are a made in a variety of ways. The two most popular methods are growing diamonds through chemical vapor distillation and also by use of heavy machinery to compress and heat carbon materials into their crystallized form.
The most abundant are stone meteorites which are primarily made up of silicate minerals such as olivine, pyroxene, and feldspar. As their name implies, iron meteorites are mainly composed of iron but also contain a significant amount of nickel. The rarest of the three are the stony-iron meteorites. They are a mixture of stony and metallic materials. Some basic facts of meteorites are: Meteorites are attracted to magnets.