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» Browse Science and Environment Term Papers
Nuclear Fusion
Number of Words: 2376 / Number of Pages: 9
... nuclei.
thermonuclear fusion of deuterium and tritium will produce a helium nucleus and
an energetic neutron that can help sustain further fusion. This is the basic
principal of the hydrogen bomb which employs a brief, controlled thermonuclear
fusion reaction. This was also how the car in the Back to the Future movie
worked. It had a much more sophisticated system of producing a fusion reaction
from things like, old coffee grounds, bananas, and old beer cans. Thermonuclear
reactions depend on high energies, and the possibility of a low-temperature
nuclear fusion has generally been discounted. ...
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Moon Expoloration
Number of Words: 538 / Number of Pages: 2
... Module,
which had some couches and was pressurized with oxygen.
Behind the CM was the SM or Service Module which had the main engine, which
had 21,500lb. of thrust. The reaction control system , oxygen, fuel cells,
hydrogen tanks, and envirnmental control systems. The main engine was only
used for changes in course and changes in orbit and escape from the lunor
orbit.
When the crew came back for reentry the CSM would split. The Command
Module had heat sheilding so it would not burn-up. When the CM first came
into reentry it was stabilized by its own engines. The second part was
done by three ...
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Microbursts
Number of Words: 1333 / Number of Pages: 5
... of there severity and small size. Professor T. Fulita, an
atmospheric scientist from the University of Chicago, coined the term
downburst for a concentrated, sever downdraft that induces an outward burst
of damaging winds at the ground. He also introduced the term microburst for
a downburst with horizontal dimensions of 4km or less (Lester 11-4).
Microbursts form by the same process that produce the more common and less
intense down drafts; that is, by precipitation drag and cooling due to the
evaporation and melting of precipitation particles. In a microburst, the
downdraft intensifies with heavy ...
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Cloning 6
Number of Words: 487 / Number of Pages: 2
... information grows we will be able to get rid of genetic diseases and defects. “As geneticists have come to understand the ways in which genes operate, they have also become aware of the myriad ways in which the environment affects their ‘expression.’” In the future people will be able to decide what their child will look like and what kind of base intelligence the child will have, but they will not be able to decide the child’s fate. For the people who want to control what their children will look like, there is the possibility of cloning a famous person.
Finally, parents will be able to clone a m ...
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An Investigation Into Electrical Resistance
Number of Words: 1160 / Number of Pages: 5
... needed to carry out the investigations. The basic setup would involve a circuit with a set of cells connected in series with an ammeter and the piece of wire being investigated, and a voltmeter connected in parallel with the wire. The ammeter is placed in series with the wire. An ammeter has a low resistance, so that it introduces as little extra resistance as possible into the circuit. The voltmeter is connected in parallel with the wire. Voltmeters have a high resistance, so the current they take is usually negligible.
We decided on the variables that could affect the resistance of a wire: ...
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Euthanasia
Number of Words: 1923 / Number of Pages: 7
... dilemmas as to its morality, it is not surprising that many issues arise in the legal and medical arenas. In law, the resolution of a particular case cannot always be applied to resolve another. In the medical realm, interpretation of medical doctrine concerning treatment of terminally-ill patients can result in entirely different applications.
In two relatively recent cases, the Supreme Court had to decide the future of patients that were considered to be in chronically persistent vegetative states. The courts had to decide whether to continue with the prevailing treatment, as advocated by the me ...
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Deforestation In The Brazilian Amazon
Number of Words: 1454 / Number of Pages: 6
... are burned or felled at the rate of 1800
hectares (about 4500 acres) every hour! (Dwyer 39) Deforestation started
hundreds of years ago, but only became a major problem in the second half
of this century, when it increased dramatically. It was enhanced by the
Brazilian government which started cutting down the forest to construct a
vast network of highways in an effort to establish a good transportation
system and improve Brazil's economy. The government wanted to encourage
the country's development by transporting poor families from overpopulated
areas of the country to Amazonia. Many poor ...
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Environmental Issues Associated With Vehicle Use
Number of Words: 1423 / Number of Pages: 6
... respiratory problems including asthma and this air pollution is thought to cause up to several thousand deaths and up to 20,000 hospital admissions every year.
Acid rain is another serious problem, helped along with the increased usage of motor cars. The increased acidity of the precipitation is down to contamination by carbon dioxide, sulphur dioxide and nitrogen oxide, all of which the car is largely responsible for. During driving, a large percentage of lead is emitted into the atmosphere and although most of it is ultimately deposited on the ground, appreciable concentrations can enter the ai ...
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The Grasslands
Number of Words: 1047 / Number of Pages: 4
... plants. They generally have a dry
climate, little vegetation, and most grasslands receive only about twenty to
thirty inches of rain each year, with most of it coming in the same season.
Some grasslands may even receive up to thirty to forty inches of rain a year!
For example, since the grasslands of the United States have hot summers and mild
winters, most of the rain comes from the summer thunderstorms. With this
limited amount of rain, only grasses and shrubs can grow. But some grassland
areas have enough rain to support some trees such as cottonwood.
With this kind of climate and vegetation, ...
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E-commerce
Number of Words: 4426 / Number of Pages: 17
... and home.
Can we discern how electronic commerce adds value to conventional marketplace transactions, making the Internet a preferred venue for business? Will markets of the future be substantially more efficient, to the extent of being "friction-free?" Or will a new regime of dominant players arise to eliminate competitors and create "winner-take-all" marketplaces?
As electronic commerce spreads internationally, an equally profound issue is the fate of national sovereignty. Economic globalization, particularly of capital markets, is altering the traditional prerogatives of nation-states to control ...
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