Resonance
.... cycle. It has passed through the tube four times
making the closed tube, one fourth the length of a sound wave. By a continuous
sound frequency, standing waves are produced in the tube. This creates a pure
tone.
We can use this knowledge of one fourth wavelength to create our own
demonstration. It does not only have to be done using wind, but can also be
demonstrated using tuning forks. If the frequency of the tuning forks is known,
then v=f(wavelength) can find you the length of your air col .....
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Nuclear Waste Disposal At Yucca Mountain: Right Or Wrong?
.... spent fuel can be retrieved later)
is built, this will be a good deal more. Other disposal types, such as sub-
seabed and space disposal may prove to be cheaper at a later time.
This is a cause for concern, but there are a greater amount of reasons
to further and eventually finish the Yucca Mountain Project. One is the desert
climate naturally occurring in the western United States. The weather is dry
and warm and their are very few natural disasters, such as earthquakes. Also,
this part of the nati .....
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Simple Machines
.... lever. Our country or world would never be this evolved if it wasn't for
machine. Almost every thing we do has a machine involved. We use machines to
manufacture goods, for transportation, ect.
In the W=F*d equation the trade of between force and distance is as you
use a machine the force goes down and distance goes up. If there was no friction
they would be equal and trade.
There are six simple machines. They are a lever, pulleys, inclined plain,
wheel and axle, screw, and wedge. The lever is use .....
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Solar Cells
.... increase with the orbital radius. When atoms bond together to form
a solid, the electron energy levels merge into bands. In electrical conductors,
these bands are continuous but in insulators and semiconductors there is an
"energy gap", in which no electron orbits can exist, between the inner valence
band and outer conduction band [Book 1]. Valence electrons help to bind together
the atoms in a solid by orbiting 2 adjacent nucleii, while conduction electrons,
being less closely bound to the nucleii, are .....
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Mechanics: Statics And Dynamics
.... mechanics
lie at the core of much engineering analysis. In fact, no physical science
plays a greater role in engineering than does mechanics, and it is the oldest of
all physical sciences. The writings of Archimedes covering bouyancy and the
lever were recorded before 200 B.C. Our modern knowledge of gravity and motion
was established by Isaac Newton (1642-1727).
Mechanics can be divided into two parts: (1) Statics, which relate to
bodies at rest, and (2) dynamics, which deal with bodies in motion. .....
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Stratospheric Observatory For Infrared Astronomy
.... for
prime contracts for the U.S. and German portions of the program. Final approval
for program implementation has been received from the U.S. Congress and NASA
management. The observatory will begin flight operations by the year 2001.
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Superconductivity
.... occupy energy
states. Each level requires a certain amount of energy. For an electron to move
to a higher level, it will require the right amount of energy. Electrons can
move between different levels and between different materials but to do that,
they require the right amount of energy and an "empty" slot in the band they
enter. The metallic conductors have a lot of these slots and this is where the
free electrons will head when voltage (energy) is applied. A simpler way to look
at this is to think of .....
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Surface Tension
.... as in the case of
mercury, which forms an almost round ball when a small quantity is placed on a
horizontal surface. The near-perfect spherical shape of a soap bubble, which is
the result of the distribution of tension on the thin film of soap, is another
example of this force; surface tension alone can support a needle placed
horizontally on a water surface.
Surface tension depends mainly upon the forces attraction between the
particles within the given liquid and also upon the gas, solid, or liquid .....
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The Big Bang And The Steady State Model
.... have observed.
The Steady State model says that the universe does not evolve or change in
time. There was no beginning 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 mod .....
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The Chaos Theory
.... world- the shapes of clouds, the paths of lightning, the
microscopic intertwining of blood vessels, the galactic clustering of stars."
(Gleick, 1987)
The man most responsible for coming up with the Chaos Theory was
Mitchell Feigenbaum, who was one of a handful of scientists at Los Alamos, New
Mexico when he first started thinking about Chaos. Feigenbaum was a little
known scientist from New York, with only one published work to his name. He
was working on nothing very important, like quas .....
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The Nuclear Power Debate
.... for half of man made
gases contributing to the Greenhouse Effect, and has sparked action from the UN
Intergovernment Panel on Climate Change. Their consensus is a concern for the
environment in the next century if fossil fuels continue to be used, even at
present global levels. The Panel claims that for carbon dioxide to be
stabilised to safe levels, a 50-80% reduction in all emissions would be required.
The United Nations has predicted a world population growth from 5.5
billion to 8.5 billion by th .....
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Thoeries Of Evolution
.... of evolution by acquired
characteristics was not tested scientifically during Lamarck's lifetime.
A successful explanation of evolutionary processes was proposed by
Charles Darwin. His most famous book, On the Origin of Species by Means of
Natural Selection (1859), is a landmark in human understanding of nature.
Pointing to variability within species, Darwin observed that while offspring
inherit a resemblance to their parents, they are not identical to them. He
further noted that some of th .....
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The Creation Of The Universe
.... "Big Bang" theory, the "Steady
State" theory, and the religious theory. The theory that best explains
creation is the Big Bang theory,
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Frogs
.... and tail disappear, and they develop lungs and legs. This period of
tadpole life can be divided into three stages. The first stage, called “
premetamorphosis,” lasts about 50 days (Patent 54). The second stage, in which
the hind legs grow, is called “prometamorphosis,” and lasts about 21 days. When
the legs are about as long as the body, the third stage, which is called “
metamorphic climax,” and takes place very rapidly, begins. During this last
stage, which lasts about a week, many great change .....
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The Physics Of Scuba Diving: Swimming With The Fish
.... start exploring the underwater world, one must first master a few
skills. Certification is the first step of learning to dive. From qualified
professionals one must learn how to use the equipment, safety precautions, and
the best places to dive. This paper is designed to help give a general
understanding of the sport and the importance that physics plays in it. Self-
contained Underwater Breathing Apparatus, or SCUBA for short, is a hell of a lot
of fun. However, there is considerably more to Diving t .....
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