Reinforced carbon-carbon

DISCUSSION The term “elastomer” refers to any member of a class of polymeric materials with the ability to regain shape after deformation.27, i The very first common elastomer was natural rubber. There were used by the Maya and Inca civilizations. With the introduction of vulcanization, by Charles Goodyear in the year 1839, the physical properties of rubbers were improved, considerably enhancing its use.27 In the 1920’s, manufacture of synthetic rubber bands were started by the petrochemical…

2.4.1 Magnesium Properties Magnesium is the essential to human body and naturally it is found in bone and it is the fourth cation in human body. Magnesium is a lightweight metal with a density of 1.74 g/cm3. The fracture toughness of magnesium are greater than the ceramic materials such as hydroxyapatite. Elastic modulus and compressive yield strength of magnesium are similarly to human bone. The disadvantages of magnesium is it has low corrosion resistance and stimulatory effects on the growth…

Organic Acids An organic acid is an organic compound with acidic properties. The most common organic acids are the carboxylic acids, whose acidity is associated with their carboxyl group –COOH. Sulfonic acids, containing the group –SO2OH, are relatively stronger acids. Alcohols, with –OH, can act as acids but they are usually very weak. In general, organic acids are weak acids and do not dissociate completely in water, whereas the strong mineral acids do. Lower molecular mass organic acids such…

Chemistry Task 2 Portfolio Outline and examine some uses of different metals through history, including contemporary uses, as uncombined metals or as alloys. Metal/Metal Alloy Uses Throughout History Copper - Used to make ornaments and domestic utensils in historical times (not as tools as it is a soft metal) - In modern times used in electrical wiring, pipes and plumbing fittings, jewellery, decoration, - This is due to its malleability, ductility and good electrical conductivity. Bronze…

Leather shooting bags are designed to carry shooting accessories, specialist items, bearing loads comfortably while leaving the shooter's hands free. They provide quick access to the weapon, scopes, and ammunition. Modern day shooting bags have compartments ensuring that everything required is handy. Some bags have been designed in a way that the shooting bag swivels from back to front making the gear more accessible, especially when on the move. While leather shooting bags come in a wide range…

Rocky S2v Vs Nike Special Field Boot As a soldier in the military you need a best boot to support your job. Survive in any conditions, although summer, rains or snow. The question is how to find the right shoes for support it? Important to remember different feet need different boots and the end of the day it truly can be the boot that carries you to extra mile. This time I will tell you about two boots which can become your choice that is Rocky S2V and Nike Special Field Boot. Design The upper…

Calibration 1: Text Cyclohexane is a six carbon cyclic alkane that is unusually stable compared to other cyclic alkanes. This stability can be seen by examining cyclohexane in its chair conformation. Since cyclohexane consists of all sp3 hybridized carbons, it ideally exists with 109.5-degree bond angles. If cyclohexane were planar, it would be forced to have 120-degree angels, and would therefore have angle strain. However, cyclohexane chair conformations are almost completely free of angle…

Lithium is an element with the atomic number 3 on the periodic table. Its atomic symbol is Li. Lithium belongs in the most reactive group on the periodic table which is called alkali metal. Lithium under standard conditions is the lightest metal it is also one of the least dense solids. Lithium has an atomic mass of 6.94 and density of 0.534. Lithium is a soft silver white looking metal. Lithium melts at 357 degrees and boils at a temper of 2426 degrees. Thanks to lithium's ability to reach…

Rosalind Elsie Franklin was a chemist and she was born in London England on July 25th, 1920. At just the age of 15 Rosalind Elsie Franklin decided she wanted to be a scientist. Receiving her education at several schools which also includes North London Collegiate School which she excelled in science. She was best known for the role she played in the the discovery of the structure of DNA, also her pioneering the use of X-ray diffraction. Franklin enrolled at Newnham College, Cambridge, in 1938…

or gases in room temperature and are generally rather poor conductors of thermal energy (heat) and electricity. They furthermore possess lower densities, boiling and melting points than metals. There may be certain rule-breakers, however, including carbon, which is a relatively good conductor of electricity. Yet, it retains all other properties associated with nonmetals aside from that single difference. Opposed to metals, nonmetals are additionally nonmalleable, or resistant to shattering, and…