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» Browse Science and Environment Term Papers
Lasers
Number of Words: 1733 / Number of Pages: 7
... in 1966, the American physicist Peter Sorokin built the first dye laser.
To begin with, I will explain the definition of a laser: It is a device that produces a very narrow powerful beam of light. A laser light is a narrow beam of light, in which all the waves are traveling exactly at the same length and moving together as one. A laser light is made up of only one wavelength and it is a single pure color, while a normal light has many different wavelengths or colors.
The most common laser has three parts to it. They are energy source, an active medium, and optical cavity. An energy source can be anyth ...
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Effects Of Dam Building
Number of Words: 1220 / Number of Pages: 5
... could probably
notice from it's name, storage dams are created to collect or hold water for
periods of time when there is a surplus supply. The water is then used when
there is a lack of supply. For example many small dams impound water in the
spring, for use in the summer dry months. Storage dams also supply a water
supply, or an improved habitat for fish and wildlife; they may store water for
hydroelectricity as well.
A diversion dam is a generation of a commonly constructed dam which is built
to provide sufficient water pressure for pushing water into ditches, canals or
other systems. These d ...
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Chemistry
Number of Words: 316 / Number of Pages: 2
... acid
contained in the human body, I digest food and clean out wastes. I am a
desperate hope for a cure, yet poison, slowly spreading in the air and along the
land. I am the colorful fireworks "sprocketed" across the dark sky when the
touch of two soft lips are gently pressed together. I am the warm tears
trickling slowly down a child's face when the thought of going to school all
alone crosses his mind. I am te pure exhilaration every time two people fall in
love. I am rubbed roughly against a filthy body and massaged along a baby's butt.
Ancient or modern, I am vigorous. ...
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Sickle Cell Anemia
Number of Words: 2576 / Number of Pages: 10
... and sickle cell trait. During 1945, Dr. Linus Pauling discovered that an abnormal form of hemoglobin was the reason for the sickness in sickle cell patients. These two took a train together and started talking about . Castle told Pauling about how the cells in sickle cell patients sickled when their oxygen level is low. Paling was amazed by this conversation and did further research on the disease. After that
Pauling was able to tell which patient had sickle cell trait and which one had the disease.
In 1956, Dr. Vernon Ingram made a distinction between normal and abnormal hemoglobin. Dr. Ingra ...
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The Big Bang
Number of Words: 1283 / Number of Pages: 5
... in the past, nor will there be change in the
future. This model assumes the perfect cosmological principle. This principle
says that the universe is the same everywhere on the large scale, at all times.2
It maintains the same average density of matter forever.
There are observational evidences found that can prove the Big Bang model
is more reasonable than the Steady State model. First, the redshifts of distant
galaxies. Redshift is a Doppler effect which states that if a galaxy is moving
away, the spectral line of that galaxy observed will have a shift to the red end.
The faster the ga ...
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The Planet Venus
Number of Words: 329 / Number of Pages: 2
... dot the surface. One flow out of a volcano is over 4,300 miles long.
Venus was the first planet to be reached by a space probe. The space probe Mariner 2 flew close to Venus that sent information to Earth. The Mariner 2 was from the United States. A space probe from the Soviet was called the Venera 7. It was the first probe to land on Venus. When it landed it stopped working because the temperature was so hot. The first color pictures was from the space probe Venera 13.
Venus, Jupiter and the moon formed a triangle on 2-17-99 and 2-18-99. Venus and Jupiter passed each other on 2-23-99. Venus a ...
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Lighting Advancments
Number of Words: 2248 / Number of Pages: 9
... form of lighting, and could be used for cooking and heating. Due to the persistent problem of limited fuel, inhabitants looked for a way to prolong the fuel. (Thwig 29-34)
The next step in lighting that followed was a candle. Candles offered one main advantage over the fire by itself, fuel. A candle was able to provide a long burning light and was relatively inexpensive to produce. Candles were originally made from whale fat. The flame would burn and would slowly use the wick as a fuel and would burn much slower because the wax slowed the burning down. (Thwig 35-49)
The next form of lighting that fol ...
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Air Pollution
Number of Words: 475 / Number of Pages: 2
... number of polluting substances, including carbon monoxide and a variety of complex hydrocarbons, nitrogen oxides, and other compounds. When acted upon by sunlight, these substances undergo a change in composition producing the brown, photochemical smog for which Los Angeles is well known. Efforts to reduce pollution from automobile engines and to develop pollution-free engines may eventually eliminate the more serious problems. In the meantime, however, has driven many forms of agriculture from the Los Angeles basin, has had a serious effect upon the pine forests in nearby mountains, and has caused r ...
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Dvd Vs. Vcr
Number of Words: 2115 / Number of Pages: 8
... in accessing video and DVD movies can play a large part in the decision of which component is right for the consumer.METHODSThe beginning of any research project is in the decision of a topic to research. I chose to research the differences between the VCR and DVD home entertainment systems because the intricacies of the systems and the ways in which they work greatly interest me. I began my work using ordinary encyclopedias, found in the Rosewood High School branch of the Wayne County Public Library. Due to the technical nature of my topics, there was very little information in the encycloped ...
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Fern Life Cycle
Number of Words: 780 / Number of Pages: 3
... One could also identify the chloroplasts with in the cell. We then put
up our dishes for another week.
The third week of our fern lab we identified the difference between male
and female gametophytes. We did this by taking a culture from our petri dish and
placing it under a dissecting microscope. Due to the male and female being both
located on the same prothallus it was necessary to obtain the exact location of
the antherium and the archegonium from the lab book or the instructor. Once this
was done it was fairly easy to tell the difference between the male gametophyte
or (antheridium) and femal ...
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