Extinction Of Dinosaurs
.... This would only account for the
dinosaurs, but not all the other creatures of that time. Paleontologists needed
to come up with a more plausible and devastating theory that would include the
other creatures that died out 65 million years ago.
There have been several major theories that have come about that can all
be substantiated. Any one of these events, theorized by paleontologists, could
have brought an end to the dinosaurs and all the other species that died with
them. Since there are many theories about this I will not write about them all.
I have chosen the theory about death by Cosmic Collision (an asteroid).
In 1980 .....
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B E C: The New Phase Of Matter
.... of matter. We do not know yet if
it absorbs, reflects,or refracts light. BEC is related to superconductivity and
may unlock some mysteries of why some minerals are able to conduct electricity
without resistance. The asymmetrical pattern of BEC is is thought by some
astrophysicists to explain the bumpy distribution of matter in the early
universe, a distribution that eventually led to the formation of galaxies.
Physicists are working on creating an atom laser, using new technology derived
from the BEC. The new lasers would be able to create etchings finer than those
that etch silicon chips today.
The discovery of BEC has pro .....
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Black Holes
.... the inward pull of gravity is overwhelming and no information about the
black hole's interior can escape to the outer universe. Applying the Einstein
Field Equations to collapsing stars, Kurt Schwarzschild discovered the critical
radius for a given mass at which matter would collapse into an infinitely dense
state known as a singularity.
At the center of the black hole lies the singularity, where matter is
crushed to infinite density, the pull of gravity is infinitely strong, and
space-time has infinite curvature. Here it is no longer meaningful to speak of
space and time, much less space-time. Jumbled up at the singular .....
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Chromium
.... ball bearings and the hard
cutting edges of high-speed machine tools.
Nickel is highly resistant to electric current and is often added to
chromium steels to make them easier to work. For example, stainless steel
sinks can be pressed out from flat sheets of steel that can contain 18 percent
chomium and 8 percent nickel.
When nickel is mixed with chromium, the resulting metal can stand
very high temperatures without corroding. For example, the heating elements of
toasters can be made from an alloy that is 80 percent nickel and 20 percent
chromium. This metal operates at a temperature of about 1380 degrees
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Collisions Of Two Objects
.... therefor not elastic, with a coefficient of restitution of less than 1.
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Comets
.... of the kind of structure proposed by Whipple. Finally, the
existence of comet groups shows that cometary nuclei are fairly solid units. The
head of a comet, including the hazy coma, may exceed the planet Jupiter in size.
The solid portion of most comets, however, is equivalent to only a few cubic
kilometers. The dust-blackened nucleus of Halley's comet, for example, is about
15 by 4 km (about 9 by 2.5 mi) in size.
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The Cosmos: Creation
.... throughout the observable
universe.
This shows three important things. First there is no significance to the
fact that earth seems to be the center of the universal expansion. In any
galaxy it would look as if you were standing still and all others were rushing
away from you. Second the movement of the universe is not like an explosion.
Galaxies are not moved through the universe but expand with the universe. Third
the galaxies themselves do not expand only the space between them.
Finally if you ask where the expansion started the only answer is everywhere.
In the words of the fifteenth-century philosopher Nicho .....
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Cryogenics And The Future
.... or the
surrounding system"(Vance 26). At the same time Pictet used the "Joule-Thompson
Effect," a thermodynamic process that states that the "temperature of a fluid is
reduced in a process involving expansion below a certain temperature and
pressure"(McClintock 4). After Cailletet and Pictet, a third method, known as
cascading, was developed by Karol S. Olszewski and Zygmut von Wroblewski in
Poland. At this point in history Oxygen was now able to be liquefied at 90 K,
then soon after liquid Nitrogen was obtained at 77 K, and because of these
advancements scientist all over the world began competing in a race to lower the
tempera .....
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Radio Waves
.... of 3 kilohertz, or
3000 cycles per second to 30 gigahertz. Within the range of frequencies, radio
waves are further divided into two groups or bands such as very low frequency (
VLF 10-30 kHz ), low frequency (LF 30-300 KHz), medium frequency ( MF 300-3000
KHz), high frequency ( HF 3-30 MHZ) and very high frequency ( VHF 30-300MHZ).
Amplitude modulation is the oldest method of transmitting voice and
music through the airwaves is by amplitude modulation. This is accomplished by
combining a sound wave from a microphone, tape, record, or CD with a "carrier"
radio wave. The result : a wave that transmits voice or programming as .....
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Does Life Exist On Mars
.... doesn't
prove anything in my mind. Especially because of the fact that it has been on
earth for 12 years when over this time the cell could have attached itself to
the meteorite.
Nobody knows enough about the subject to start telling the public that this is
true, they should have never released it unless it were defiantly proven to be
fact. NASA has a big name in the world, they should be more carefule next time.
I just hope that whatever NASA had to say to the president in private isn't
different to what they told the public We hear often that the media finds people
that used to work for the US Government that seem to b .....
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Earthquakes
.... Primary or
compressional waves (P waves) send particles oscillating back and forth in the
same direction as the waves are traveling, whereas secondary or transverse shear
waves (S waves) impart vibrations perpendicular to their direction of travel. P
waves always travel at higher velocities than S waves, so whenever an earthquake
occurs, P waves are the first to arrive and to be recorded at geophysical
research stations worldwide.(Associated Press 1993)
Earthquake waves were observed in this and other ways for centuries, but
more scientific theories as to the causes of quakes were not proposed until
modern times. One such conc .....
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