The Hale Bopp Comet
.... objects
there."
Thomas Bopp explains his story like this, "On the night of July 22, 1995
some friends and I headed out into the desert for a dark of the moon observing
session. The site, which is west of Stanfield, AZ and a few mile south of
Interstate 8 is about 90 miles southwest from my home.
My friend Jim Stevens had brought his 17-1/2" Dobsonian. We started the
evening observing some of the Messier objects such as the Veil and North
American Nebulae in Cygnus, when Jim said " Let's look at some of the globulars
in Sagittarius." We started our tour with M22 and M28, observing at 50X and then
at 180X. Around 11:00 local time .....
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Arizona Concrete
.... forms of calcium
sulfate (gypsum) as an interground addition. Materials used in the manufacture
of portland cement must contain appropriate proportions of calcium oxide, silica,
alumina, and iron oxide components. During manufacture, analyses of all
materials are made frequently to ensure a uniformly high quality cement.
Selected raw materials are crushed, milled, and proportioned in such a
way that the resulting mixture has the desired chemical composition. The raw
materials are generally a mixture of calcareous (calcium oxide) material, such
as limestone, chalk or shells, and an argillaceous (silica and alumina) materia .....
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Avalanches And Landslides
.... were the one that took lives in Anchorage, and destroyed
property
There are a couple of types of avalanches and how the destroy so much this one
is named "Loose Snow Avalanches"1, it starts' in a small area then grows in size
and mass as it descends.Another type is the "Slab Avalanche" it actually starts
in a large area of ice and snow and then begins to slide.
On September 12 of 1717 crusaded down the Troilet, Italy glacier, gaining speed
on a cushion of air reaching a falling velocity of km/hr over a 3600 m fall.
Two towns were destroyed, with seven people killed and a 120 cows lost. The
slosh of an avalanche ran up the far s .....
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Circulation Systems Over China
.... of the circulation
system that operates over China, we should start from discussing the seasonal
pressure distribution at sea-level over the Asia-Pacific region, which is the
driving force for the air movements in China. Most clearly to be seen, the
largest difference in the atmospheric pressure occurs between winter and summer,
whereby January and July can be considered as representative months. In January,
a typical cold anticyclone with central pressure above 1,040 hectopascals (hPa)
developed over mid-Siberia and Mongolia (Mongolian High); while a strongly
established cyclone over the north-western Pacific Ocean (Aleutia .....
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Climatology
.... increasing cold; and the E climates mark the polar areas.
The first letter is followed by two more letters that further define the climate
of that region. The second letter represents and explains the dry season:
whether there is or isn't a dry season, whether it is a short or long dry
season, and what season it comes in either a dry winter or a dry summer. The
third letter defines the temperature of different seasons either a hot or cool
summer or a cold or warm winter.
The purpose of the Koppen Climate Classification system is to assist in
the realization of the importance of generalization, allowing you to
concentrate .....
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Copper And Molybdenum Deposits In The United States
.... after a
source was discovered in New Jersey around 1719. In later times domestic copper
resources did not satisfy national needs until the discovery of gold in
California shifted the focus of mineral exploration westward and strikes of rich
copper ores occurred in Tennessee and the Cordilleran base regions. The Civil
War caused copper demand to increase greatly in order to manufacture cartridges
and canned goods, this resulted in the openings of numerous copper mines of
which more than 90% were in the Lake Superior area giving an important advantage
to the Union armies. Major copper production districts then shifted to Mont .....
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Natural Disasters
.... starts on September 10 and runs to the end of
November. The date of September 10 is the midway point between the two seasons.
This is the date that separates early season from late season. This leads me to
what my research was about. I am writing about the differences between early
season and late season hurricanes and how they effect the variable that were
mentioned earlier in the paper. I feel that late season hurricanes cause more
economic loss than early season hurricanes.
I will start by taking about what a hurricane is and how they are formed.
Then I will discuss where they are formed in relation to the seasons and why in .....
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Changes In The Earth's Environment
.... in terms of their magnitude or frequency and
causing significant damage to man and his works with possible loss of life.”
(Heathcote,1979,p.3.). A natural hazard occurs when there is an interaction
between a system of human resource management and extreme or rare natural
phenomena (Chapman,1994). As McCall, Laming and Scott (1991) argue, strictly
speaking there is no hazard unless humans are affected in some way. Yet the line
between natural and human-made hazards is a finely drawn one and usually
overlapping. Doornkamp ( cited in McCall et al, 1992) argues that many hazards
are human induced or at least made worse by the .....
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Fossil Fuel Consumption, CO2 And Its Impact On Global Climate
.... The quantity of ultimately recoverable fossil fuels is limited by
geology and remains a matter of suspicion, but the view of the 1970s that
scarcity was imminent is still popular. It is the 1973 Oil Crisis marked the
transition from abundant, low-cost energy to an era of increasing prices and
scarcity. Today concerns over scarcity have been overtaken by the question of
whether human beings can afford to meet the environmental costs of continued
fossil fuel consumption. One of the most widespread concern related to global
climatic changes.
Introduction: Climate represents normal weather condition of an area over a
period of many .....
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The Ocean
.... The wind mainly affects only the upper 100 to 200 meters of
water. However, the flow of wind-driven currents may extend to depths of 1,000
meters or more.
Thermohaline circulation produces great vertical currents' hat flow from the
surface to the ocean bottom and back. The currents largely result from
differences in water temperature and salinity. The currents move sluggishly from
the polar regions, along the sea floor, and back to the surface. In the polar
regions, The surface waters become colder and saltier. Being colder and saltier
makes these waters heavier, and they gradually flow back toward the surface and
replace the .....
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Ocean Environment
.... in influencing the
distribution of plants and animals.
The sediments of the sea floor may be divided into lithogenous,
hydrogenous, biogenous, and cosmogenous sediments. Lithogenous sediments are
the major sediments on the ocean floor. They are derived from the chemical and
mechanical weathering of rocks. Biogenous sediments are composed primarily of
the protective outter covering of small marine animals and plants. If these
remains comprise at least thirty percent of the sediment it is called an "ooze".
"Oozes" were named for the types of organisms that formed them. Hydrogenous
sediments form as a result of the chemical re .....
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Tundra And The Artic
.... is also the reason why the
Tundra receives cold weather; at it's degree of latitude the suns rays end up
hitting the region obliquely, thus causing less solar heat. Here are the
temperatures of the Tundra in general:
Average January temperature: -32.1 degrees Celsius
Average July temperature: +4.1 degrees Celsius
Temperature range: 36.2 degrees Celsius
Average annual temperature: -17 degrees Celsius
Lowest temperature recorded: -52.5 degrees Celsius
Highest temperature recorded: +18.3 degrees Celsius
After seeing these temperatures you can see the reason why barely anyone lives
up there and why there is rather little natura .....
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