Aluminium

1.2. Cones Speaker cones vary in size and shape as well as the material they are made of. They range from original Rice and Kellog design-paper cone, through Kevlar and carbon fibre, metal (aluminium) and a variety of composites, each manufacturer employing different materials suited to providing the best efficiency and linearity. First of all they wanted to achieve manufacturing consistency since wood is not a homogenous substance and tends to vary from one form of timber to another, even…

INTRODUCTION: Indigestion is difficulty digesting food; it causes pain or discomfort in the stomach. Most commonly, people suffer from indigestion by overeating, drinking alcohol while eating, or eating greasy, fried or spicy foods. Acid in the stomach helps digest food and prevents infection. Mucus lines the stomach, bowel and oesophagus and acts as a barrier against the acid. If the layer of mucous gets damaged, the stomach acid can aggravate and cause inflammation to the stomach; this leads…

glance, Ellen Garvens’ St Sebastian appears to be a tangle of metal, but a second look reveals the artist’s powerful political statement. The piece consists of a hanging construction of copper tubing, a black and white photograph and a sheet of aluminium. Garven uses the photograph to symbolize the oppression of nontraditional sexual orientations and the metal to symbolize the expectations of a heteronormative society. The photograph depicts the left side of a young man’s torso, from the middle…

Literature Review Safety of bicycle brakes The safety of bicycles is a very important factor when riding a bicycle. Safety always comes first, but have you ever thought to yourself is your bicycle safe? Are the brakes on your bicycle good enough to keep you safe? All these questions pop into mind but never get a quick answer. Calliper brakes are not of the safest brakes out there, if not used in the correct manner it more likely you will lose control while applying brakes and end up having an…

Bunker Fuel Investigation The effect of bunker fuels on the Port Adelaide area. Introduction Bunker fuel is a form of crude oil which is left over from the refining process of petroleum. Bunker fuel is typically a very thick sludge because of the large amount of impurities such as sulfur and nitrogen. These impurities make bunker fuel extremely cheap for ship operators, but has a much more negative effect on the environment, as when the fuel is burnt the impurities are released into the…

CHAPTER 1 INTRODUCTION 1.1 BACKGROUND The catalytic converter was invented by Eugene Houdry, a French mechanical engineer and skilled in catalytic oil refining who lived in the United States around 1950. The invention of catalytic converter has a major role in controlling harmful emissions. When the paper of smog in Los Angeles was published, Houdry became anxious about the role of smoke stack and automobile exhaust in air pollution and established a company, Oxy-Catalyst. Houdry primary…

and economic issues, eradicate future potential liabilities as well and increase profit. The new treatment system is fairly new resulted from years and millions of dollars in researches initiated by different aluminum companies such as Portland Aluminium, Ausmelt, CSIRO and Alcoa. These researches were conducted mainly in…

rising.1 As the frequency of air travel is increasing, it places a pressure on the aerospace industry to improve material performance and the efficiency of their transportation.2 Classically aircraft were constructed from metallic materials such as aluminium and titanium. Therefore, new materials must have specific properties and characteristics that the metallic materials possess, but in addition, present further beneficial properties. Aeronautical materials must possess a high Young’s modulus…

The history of immunizations and vaccines in Europe and the Americas began with Edward Jenner, a British doctor who lived in Gloucestershire, England. Jenner performed the world’s first vaccination in 1796, created to protect the world against smallpox. By inoculating people with substances from a cowpox lesion, he was able to create immunity to smallpox all over the world. Vaccines and antitoxins against anthrax, diphtheria, plague, tuberculosis, and more were developed over the 1930s. Over…

It is important to have your child get the vaccination done to protect the future generation. There are many good effects to getting the vaccine it can save your child's life from bad diseases, it protects others you care about, vaccinations are very safe and affective and it can save your family time and money. The vaccine is meant for good things and it is meant for your child to avoid going through pain. It can help with anything in general it helps you by not going into the hospital because…