Xenon
.... a temperature that is lower than xenon. So the
scientists could predict that heating the mixture would leave krypton in the
container, while the faster boiling xenon leaving it. After the two scientists
separated krypton and xenon, they identified it as a new element through the
emission spectrum of the gas.
Xenon is used heavily in light bulbs. Many of the bulbs in camera
flashes have xenon in them, because they can be used over 10,000 times without
burning out, as well as producing a good balance of all colors. Xenon is also
used in medical purposes. Local anesthesia is made up of 20% oxygen and 80%
xenon. Xenon also can b .....
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The Water And The Waves
.... to us when she passes it through the raindrops of a summer
shower and produces a rainbow. We also know that light consists of waves,
and that the different colors of light are produced by waves of different
lengths, red light by long waves and blue light by short waves. The
mixture of waves which constitutes sunlight has to struggle through the
obstacles it meets in the atmosphere, just as the mizture of waves at the
seaside has to struggle past the columns of the pier. And these obstacles
treat the light-waves much as the columns of the pier treat the waves. The
long waves which constitute red light are hardly affected, b .....
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UFO Crash Near Roswell, NM
.... was unlike anything they had ever seen. On July 6
Brazel drove into town with a few pieces of the wreck. He showed the
material to the Chaves County Sheriff George Wilcox. The sheriff called the
Roswell Army Air Field(AAF) and talked to Major Jesse Marcel, the
intelligence officer. After inspecting Brazel's material, Marcel reported
to his commanding officer Colonel William "Butch" Blanchard, who ordered
Marcel to get someone from the Counter Intelligence Corps and proceed with
Marcel to the ranch and collect as much wreckage as they could load into
their vehicles. Marcel, Sheridan Cavitt, and Brazel arrived at the ranch
that nig .....
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Uranium
.... uranium in 1954 for the first nuclear powered
submarine in the U.S.
Chapter 5
History
Uranium was discovered in 1789 in pitchblende by a German chemist
Martin Heinrich Klaproth who named it after the planet Uranus. The
radioactive properties of uranium were first showed in 1896 when a French
physicist Antoine Henri Becquerel produced an image on a photographic plate
covered with a light-absorbing substance.
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Water Transitions
.... (ppt.), but on a particularly rainy morning,
the salinity may decrease to something as low as thirty-two ppt. (Stuller
29).
The mixing of freshwater and sea water forms a third type of water,
known as brackish water. Brackish water can be found in a variety of
mixing zones such as river deltas, freshwater title marshes, estuaries,
fjords, and in the middle of the ocean (Stuller 30). To begin with,
freshwater traveling towards the sea carries suspended particles. As the
particles make contact with saltwater, an electrochemical reaction called
flocculation takes place. The clay with a positive charge, and the sodium
chl .....
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Buoyant Forces
.... percentage error with the buoyant force from step one was calculated
using, this resulted, using .114 for Fb and .0813 for Wdisp, a 28.7% error.
After completing this lab, it has become more apparent as to how to
calculate boyant forces and how that information can be used.
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Plants
.... species is, in part, a reflection
of the many distinct cell types that make up individual plants. Fundamental
similarities exist among all these cell types, however, and these
similarities indicate the common origin and the interrelationships of the
different plant species. Each individual plant cell is at least partly
self-sufficient, being isolated from its neighbors by a cell membrane, or
plasma membrane, and a cell wall. The membrane and wall allow the
individual cell to carry out its functions.
Tissue Systems
There are many variants of the generalized plant cell and its parts.
Similar kinds of cells are organized i .....
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Bacteria And Their Effects
.... can also be harmful.Some bacteria cause diseases such as
Tuberculosis,Gonorrhea,Typhoid fever,Lyme disease,Gangrene,and
Endocarditis.Some of these diseases are fatal.Bacteria can also cause skin
diseases such as Dermatitis,Leprosy,and Carbuncle.Some bacterial diseases
can be controlled by antibiotics.Some of these are
Penicillins,Cephalosporin,
Aminoglycosides,Tetracyclines,Macrolides,and Sulfonamides.Though over the
years some bacterias have evolved and become immune to antibiotics making
them unstoppable.Bacteria can also pollute water,decay teeth,and can poison
food.
I think that bacteria just about evens out on my goo .....
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Static Electricity
.... very tiny particles called atoms. Atoms
are made up of even smaller substances called subatomic particles.
Scientific studies have found that some of these subatomic particles are
charged with electricity. The electric charges are made up of two kinds -
positive and negative. The positively charged particles are called protons,
and the particles with negative charges are called electrons. In an atom,
the protons are located in the center, or nucleus, and the electrons
revolve in a series of orbits around the nucleus. All electric charges are
caused by the combined effects of proton and electron charges.
The most common cause of .....
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Pluto
.... extremely frigid tempetures are due to its obvious distance
from the sun.Its atmosphere consists of nothing more than methane.Plutos
thin atmosphere also contributes greatly to its extremely low atmospheric
pressure only one hundred times weaker than that of Earth's. Its surface
is made of very rocky material which is believed to be caused by the low
tempeture, and atmospheric pressure.
Pluto has only one natural satellite named Charon.Not so much as
satellite a duplicate of Pluto its diameter is one thousand nine hundred
ninety two kilometers (720 miles).Discovered in nineteen seventy eight
this natural satelli .....
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Helium
.... helium, a liquid with unique physical properties.
It has no freezing point, and its viscosity is zero; it passes readily
through minute cracks and pores and will even creep up the sides and over
the lip of a container. Helium-3, the lighter helium isotope of mass 3,
which has an even lower boiling point than ordinary helium, exhibits
markedly different properties when liquefied.
Because it is noncombustible, helium is preferred to hydrogen as
the lifting gas in lighter-than-air balloons; it has 92 percent of the
lifting power of hydrogen, although it weighs twice as much. Helium is used
to pressurize and stiffen the stru .....
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Is There Evidence That Homosexuality Is Biologically Determined?
.... Among them are stated in the article. A replication of the
experiment is necessary, the separation of the particular gene has not been
achieved, and the importance of the region has not yet been determined.
Moreover, the supposed gene that influences homosexuality suggests that it
acts indirectly on the choice of their sexual orientation. LeVay and Hamer
mention their perspective on the cause of homosexuality that was derived
from extensive experiments.
Throughout the article, “Evidence for Biological Influence in Male
Homosexuality,” LeVay and Hamer succeed in presenting where they stand on
the issue by providing evidence .....
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