Insulation
.... retains the most heat. "Insulation is material that
protects against heat, cold, electricity, or sound." (Science Encyclopedia,
1984). In this case the insulation will be protecting against a cold temperature.
The hypothesis is if denim, cotton T-shirt material, wool fabric,
polyester fabric, thermal underwear, and a Ziplock bag with out insulating
material are tested to see which one retains the most heat, then wool fabric
will retain the most heat because it holds an important place in today's textile
trade because of its good insulation and the fact that it comes from the
protective coat of sheep who need to stay warm .....
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Intermolecular Bonding Essay
.... (a) sodium chloride and
(b) calcium fluoride. Each atom forms an ion with an outer shell containing
eight electrons.
For many elements, compounds cannot be formed by the production of ions, since
the energy released in the formation of the lattice of ions would be
insufficient to overcome the energy required to form the ions would be
insufficient to overcome the energy required to form the ions in the first place.
In order for the atoms to achieve a noble gas configuration they must use
another method of bonding by the process of electron sharing. From figure 2, you
can see that the example of two hydrogen atoms combing. As the .....
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Involvement Of K+ In Leaf Movements During Suntracking
.... behavior usually do so at midday, when the sun’s
rays are perpendicular to the ground. This reorientation takes place only in
leaves of plants that are capable of nastic light-driven movements, such as the
trifoliate leaf of Erythrina spp. (Herbert 1984). However, this phenomenon has
been observed in other legume species that exhibit diaheliotropic leaf movement
as well. Their movement is temporarily transformed from diaheliotropic to
paraheliotropic. In doing so, the interception of solar radiation is maximized
during the morning and late afternoon, and minimized during midday. The leaves
of Crotalaria pallida a .....
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Iron
.... comes out of the water and collects
on the sea floor. This creates an underwater deposit. This process occurs over
billions of years. Through plate movement the whole sea floor is eventually
moved up out of the water. Once out of the water, the iron has formed a land
deposit. The biggest iron deposit in the United States is in the Great Lakes.
Northern Minnesota is often called the Iron Range. There are two ways iron
deposits are located. In the first method special machines that detects the
iron's magnetism are used ti find a deposit. In the second method a plane with
special equipment flies over an area of land suspected .....
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Lab Protocols
.... is to not touch anything that the teacher or the lab
specifically instructs you to. Because you don't need to.
The seventh rule states that activities should only be done if they are
specifically discussed in your lab. This is for safety purposes and for the
liability of the school.
The eighth rule is that you are not to contaminate chemicals by using
equipment in more than one substance without washing it thoroughly. Doing this
can cause explosion, fire, bodily harm, poisonous gasses, or possibly death.
Also do not return chemicals to the original container after they have been used.
The ninth rule is that you must rea .....
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Lead And The Environment
.... was used in ancient times for making coinage, art objects and water
pipes. One of the first known toxic substances, lead was used by the Romans for
lining aqueducts and in glazes on containers used for food and wine storage; and
it is suspected to have resulted in widespread lead poisoning. Members of the
famous Franklin Expedition to the Northwest Passage in the mid-1840s met a
similar fate, being poisoned from lead in solder, widely used at the time to
seal tins used to store foods. Until recently, one of the most significant uses
was an anti-knock additive in gasoline. In the 1970s and 1980s, steps were taken
to reduce .....
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Essay On Metals
.... it wears quickly from the purely mechanic rubbing of your skin
and of other jewellery.
The common solution, however, is not without its flaws. "Cutting"
the gold with cheaper metals can mean dramatic savings in material cost and
highly improved resistance to wear but we must remember that it also
changes the other special property of gold - its resistance to corrosion.
Some chemicals in more-or-less popular use in body-piercing circles
(Betadine, to be specific) will tarnish "gold" of as high as 18 K, though
of course it is really the alloying metals that are affected. Also - and
this is really the important bit - the more "im .....
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Moon Expoloration
.... Service Module which had the main engine, which
had 21,500lb. of thrust. The reaction control system , oxygen, fuel cells,
hydrogen tanks, and envirnmental control systems. The main engine was only
used for changes in course and changes in orbit and escape from the lunor
orbit.
When the crew came back for reentry the CSM would split. The Command
Module had heat sheilding so it would not burn-up. When the CM first came
into reentry it was stabilized by its own engines. The second part was
done by three parachutes and a drogue.
The First Lunar Landing took place on July 16,1969, it was named Apollo 11.
It made the first landing .....
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Mercury
.... degree of rise or fall in temperature is the same. The use of mercury in
the thermometer instead of alcohol was done by Gabriel Daniel Fahrenheit in 1714.
It was also used in vacuum pumps, barometers, and electric rectifiers and
switches. Mercury is used in a mercury-vapor lamps which are used as a source
of ultraviolet rays in homes and for sterilizing water. Mercury-vapor is also
used instead of steam in the boilers of some turbine engines. Mercury is
sometimes used for amalgamation. Amalgamation is a metallurgical process that
utilizes mercury to dissolve silver or gold to form an amalgam. This process
has been largel .....
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Scenes Of Nature
.... grasp the deep greens. The coast of California holds the deep blues
of the pacific. The ocean varies with its location.
The different scenes of nature are very intriguing. Whether it is
the sky, the forest, or the ocean one may enjoy them anytime of the year
day or night.
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Mini-Research
.... became known as
a proton.
NEUTRON- In 1932, James Chadwick detected the third of the basic parts of an
atom. He showed that uncharged particles, or neutrons, are emitted when atoms
of other elements are bombarded with high-velocity helium atoms with all
electrons remored, or an alpha particle. Neutrons were determined to have a
mass of 1.0087 amu. They are unstable outside of an atom and slowly degenerate
to form protons and electrons.
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