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Common Cold

... cause of the is the virus infection. The virus inflection includes the flu and influenza. The flu is cause by a smaller family of viruses compares to the more severity of influenza, which is caused by more than 200 virus. Virtually finding a vaccine for the flu is very simple, but finding a vaccine for influenza is virtually nil. Another cause of the is the Antibody for specific virus. Dr Stone thinks that the accumulation of stress tips the infected person over into illness. In his study of 72 married white men for a period of 12 weeks, ...

Number of words: 649 | Number of pages: 3

Analysis Of A Vapor Power Plant

... to a closed feedwater heater at P1, with saturated liquid condensate being pumped ahead into the boiler feedwater line. The Terminal Temperature Difference of the feedwater heater is 5°C. The rest of the steam is reheated to 500°C, and then enters the second stage of expansion. Part of the steam is extracted between the second and third stages at P2 and fed into an open feedwater heater operating at that pressure. Saturated liquid at P2 leaves the open feedwater heater. The efficiencies of all pumps are 80%, and the efficiencies of all turb ...

Number of words: 1672 | Number of pages: 7

Neptune

... its 1989 flyby f Neptune. Neptune as compared to Earth is 3.9 times the diameter, 30 times the distance from the sun, 17 times as massive, and 0.3 times the density. Neptune travels around the Sun in an elliptical orbit at an average distance of 4.504 billion km (2.799 billion miles). Neptune consists largely of hydrogen and helium, and it has no apparent solid surface. The first two thirds of Neptune is composed of a mixture of molten rock, water, liquid ammonia and methane. The outer third is a mixture of heated gases comprised of hydroge ...

Number of words: 943 | Number of pages: 4

Why We Have Seasons

... of fall and winter occur. The first three months are the season of spring and the second three months are the months of summer. The vernal equinox occurs when the sun is directly over the equator and it complies with the first day of spring. It also means that the sun is an equal distance from the north and south poles. At this time both hemispheres have the same amount of sun as the sun makes its way north. Before the vernal equinox the sun hits the northern surface at an angle instead of hitting it directly. By hitting the earth's surfa ...

Number of words: 773 | Number of pages: 3

Global Warming

... is occurring now and it's changing global climate."(1989 Koral). After the 1900's people started making factories and started using fossil fuels like coal, oil, and aluminum. It was the industrial revolution and overpopulation of humans that was the cause of the environmental problems that we have today. 2. Human Activity Causing the Problem The reason our Earth is getting hotter is that human activities are emitting too much carbon dioxide into the atmosphere. The radiation from the sun gets trapped in the bag of carbon dioxide that sur ...

Number of words: 2327 | Number of pages: 9

A Discussion On Earthquakes

... the history of the world. Descriptions as old as recorded history show the significant effects earthquakes have had on people's lives. Long before there were scientific theories for the cause of earthquakes, people around the world created folklore to explain them. Until recent times, science has not had a complete understanding of how earthquakes are caused, and what can be done to predict when they will strike. This essay will discuss how earthquakes are formed and occur, how scientists can more accurately predict the arrival of ea ...

Number of words: 1189 | Number of pages: 5

Cobalt

... trioxides. Cobalt was named after the German kobold. A kobold was said to be an underground goblin or demon. In 1735 cobalt was identified. Cobalt is a white metal with a bluish cast. It is magnetic and very hard and does not tarnish. Cobalt has many uses and I will talk about some of them. It is a very expensive metal that is used in the manufacture of very many expensive alloys. Cobalt-iron alloys have very unique and special magnetic properties. For example, Hyperco is used as the nucleus in strong electromagnets. Alloys con ...

Number of words: 332 | Number of pages: 2

Hammerhead Sharks

... which resembles the head of a hammer. Their eyes and nostrils are at the ends of the hammer. There are many species of Hammerheads. There are eight living species of hammerheads. The following four are the main categories: 1. Scalloped hammerhead (Sphyrna lewini)-Pectoral fins are tipped with black this grey shark. The maximum length is about 12 feet. 2. Bonnethead (Spyrna tiburo)-With a head shaped like a shovel the bonnethead rarely grows more than four feet long. This shark is commonly seen inshore. 3. Smooth hammerhead (Sphyrna ...

Number of words: 965 | Number of pages: 4

Minerals

... but with two important needs; the concentration of mineral and the size of the deposit. We want to make sure the mineral is high grade and large enough to repay the investment and make profit. Of the many mineral found, there is only a few mineral will appear to have good potential. So it must be tested widely, which costs a lot of time and speed is one of the critical factors. If the construction is financed by loans, it leads up to high interest costs. The economics of a mine depends upon ore reserves, grade, type of ore, and the locatio ...

Number of words: 417 | Number of pages: 2

Earthquakes

... , Ruaumoko is said to have pressed into the earthquake as his mother turned face downward while feeding him. According to the legend, he has been growling and spitting fire ever since. Aristotle believed that "mild were caused by wind escaping from caves within the bowels of the earth and severe shocks were by gales that found their way into great subterranean caverns" (Matthys 87). However, with modern technology we found that what actually causes is tectonic plates which on average move only two inches per year they are driven by convec ...

Number of words: 1146 | Number of pages: 5

Cisc And Risc Processor Technologies

... is the most commonly used style today. By reading this report you will be able to define the term CISC. Be able to list the characteristics of a CISC instruction set and also the decisions and philosophies which led to the development for this technology. Also this report describes the RISC style of computer processor architecture. Which is replacing CISC in some uses. Define the term RISC. Describe the characteristics of RISC technology. And also point the advantages and disadvantages of using this technology. At the end of this ...

Number of words: 1812 | Number of pages: 7

Can We Say "NO" To Recycling

... up, wearing out, replacing and disposing at an alarming rate.(Durning 1992). However, unfortunately recycling has proven that it is quite costly. Although recycling of wastes material solves the problem of garbage disposal at landfills, and saves resources, it does nevertheless entail large hidden costs in collecting, sorting and manufacturing; therefore, it is necessary for the government to overcome such problems of recycling to be worth while and for manufacturers and consumers to consume less. Recycling has proven its efficiency in ...

Number of words: 2392 | Number of pages: 9

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