|
|
|
» Browse Science and Environment Term Papers
The Effects Of Over-Population On The Earth's Water Supply
Number of Words: 1100 / Number of Pages: 4
... and fresh water. The underlying link between all of these areas is water. The following four articles reveal that the water supplies that we all depend on are being used at an unsustainable rate. There is not enough fresh water on this planet for current growth rates to continue.
The Public Broadcasting Company has posted on the Internet a timeline detailing the Earth's population at different years. According to this Population Timeline, the population in the "year 1954 was three billion"(2), in the "year 2000 the population is at approximately six billion"(3). This means that the Earth's population ...
|
|
Alchemy
Number of Words: 3747 / Number of Pages: 14
... marvelous powers, and
it was thought that there resided within in the individualities of the
various metals, that in it their various substances were incorporated.
This black powder was mystically identified with the underworld form of the
god Osiris, and consequently was credited with magical properties. Thus
there grew up in Egypt the belief that magical powers existed in fluxes and
alloys. Probably such a belief existed throughout Europe in connection
with the bronze-working castes of its several races. Its was probably in
the Byzantium of the fourth century, however, that alchemical scie ...
|
|
The Superstring Theory
Number of Words: 4497 / Number of Pages: 17
... replies, "Big or small?" The student baffled by this, prompts again, "Um, physics?" The teacher noticing the ignorance in the room explains, "Physics is split into two major fields: Relativity (Einstein) and Quantum. Thus, they explain big forces in nature and small forces in nature, respectively. They are not cross- applicable." The student, still baffled, persisted, "But if physics explains nature, how is it that nature can be prejudiced in what applies? I mean, why can't you just plug in numbers into equations and get the right answer, regardless of how small or large the numbers becomes?" T ...
|
|
Cyclohexanone
Number of Words: 905 / Number of Pages: 4
... of infrared light by a sample. The
wavelength of IR absorption bands are characteristic of specific types
of chemical bonds.
An IR spectrophotometer is an instrument which is designed to
obtain an infrared spectra of a molecule. An IR spectra is obtained by
first irradiating a sample with an IR source of light. The light passes
through the sample, which can be in solution or contained within a
salt plate, and then onto an IR light detector. The spectrum is
analyzed by examining at which frequency the peaks occur. Different
peak frequencies indicate diff ...
|
|
Bovine Spongiform Encephalopathy
Number of Words: 2159 / Number of Pages: 8
... of neuronal perikarya and grey-matter
neuropil was the scientists' overall conclusion (Stadthalle, 1993). These
lesions are consistent with the diseases of the more common scrapie family.
Without further investigation, the conclusion was made that BSE was a new member
of the scrapie family (Westgarth, 1994).
Transmission of BSE is rather common throughout the cattle industry.
After the incubation period of one to two years, experimental transmission was
found possible by the injection of brain homogenates from clinical cases
(Swanson, 1990). This only confirmed that BSE is caused by a scrapie ...
|
|
Future Of Radio And The Internet
Number of Words: 942 / Number of Pages: 4
... Currently, any interactivity is limited by the inability of the individual talk to the other end of a radio transmission chain. When one switches stations on our radio, there is no interaction, we are simply selecting from a series of predefined options, just like changing channels on television. If you switch from one station to another, none of the stations know about it, and can do nothing to make their programming more interesting than their competition.
The Internet has no such limitations, from the ground up; it was designed as a mass communications medium that was two ways. With the Int ...
|
|
Nuclear Legacy
Number of Words: 1091 / Number of Pages: 4
... sites may sound frightening, but it may be
the only way for us to dispose the devastation we had longed to create. In 1986,
the decision for a nuclear waste depositary proved to be "the most frightening
decision of the decade." Of these sites, three were chosen to be the "most
suitable" for the disposal of nuclear by-products. These three sites consisted
of Hanford, Washington; Yuka Mountain, Nevada; and Defsmith, Texas.
Hanford, Washington is a low populated U.S. city, and is owned by the
Department of Energy. A low populated city is an ideal site for radioactive
disposal. Although the city o ...
|
|
Fluorescence Study Of Dyes
Number of Words: 815 / Number of Pages: 3
... will try to determine the quenching constant and the distance at which decay and energy transfer are equally probable, as well as prove that Stern-Volmer's law and Förster's theory are obeyed.
2. Results
2.1. Electronic Absorption Spectra
We made up stock solutions for both salts and diluted them down to use in the UV/vis spectrometer.
Coumarin 1
C = 8 x10-5 mol dm -3
We obtained a spectrum with a maximum at 376.5nm at an absorbance of 1.4573, using Beer-Lambert's law, we deduced the molar decadic absorption coefficients.
Sodium fluorescein
C = 2.425 x10-5 mol dm -3
Here max w ...
|
|
Meth 2
Number of Words: 358 / Number of Pages: 2
... heart rate, aids and HIV through the use of needles,
dependence, tolerance, addiction, and can cause psychosis.
The use of Meth is going up. In 1995, 3.9% of high school
seniors had used it. That's an increase of 2.7% since 1990. 8 out of
10 people who try Meth will become addicted. Famous people who
have done Meth include- Chris Farley, John Belushi, and Mick
Jagger. The cost of doing Meth is very high too. A user can spend
up to $100 a day. And sometimes, spending $400-$500 to support
an addiction is not unusual. The penalties are very severe for those
caught with Meth. Possession of ...
|
|
Using Bicycles As An Alternative To Automobiles
Number of Words: 1470 / Number of Pages: 6
... that can be improved by the use of bicycles. There are several major
problems that could be drastically reduced by the increased use of bicycles.
Traffic would be a lot lighter due to the extremely small size of bicycles. It
would also greatly reduce the wear and tear on our roads and highways, and
therefore reduce government expenditure. But one of the most serious problems
it would reduce is that of pollution and smog in out larger cities.
There are more benefits to biking, though. There are benefits that come at a
more personal level.
Biking greatly improves ones health. It can be a way to ...
|
|
|
