Essays Tagged: "high temperatures"


letters. Its atomic number is ninety-four. Plutonium is able to maintain its solid state until very high temperatures, melting at six hundred and forty degrees Celsius, and boiling at three thousand f ... ly after, Seaborg was able to isolate plutonium 239, an isotope used in atomic bombs.Plutonium is a highly dangerous and poisonous element because it rapidly gives off radiation in the form of alpha p ...

(3 pages) 38 0 3.7 Jan/1996

Subjects: Science Essays > Chemistry

Drought in Morocco (with sources!)problem analysis of drought in Morocco

tended period of time, usually a season or more in length, although other climatic factors (such as high temperatures, high winds, and low relative humidity) are often associated with it in many regio ...

(4 pages) 79 2 4.0 Apr/2003

Subjects: Area & Country Studies Essays

What are the Causes and Effects of Interactions Between the Solar Wind and Planetary Bodies?

gh the nuclear fusion of atoms in its core but also produces huge amounts of ionised gas due to the high temperatures. This gas is known as the solar wind and one million tonnes is emitted each second ... tic pole to the other. This is due to a subtle interaction taking place where the magnetic force is high and field lines converge at the poles, causing the particles to be repelled. This causes them s ...

(12 pages) 33 0 2.6 Feb/2004

Subjects: Science Essays > Earth Sciences

The Costa Rican Government

ded its economy to include strong technology and tourism sectors. This democratic republic has very high temperatures being only about seven hundred miles from the equator. Surrounded by two well-know ...

(1 pages) 47 1 4.3 Jun/2004

Subjects: Law & Government Essays > Government

Biology Investigation How Light Affects Photosynthesis

arbon dioxide (C02) Size (surface area of plant) Amount of water (H2O)Temperature: At high temperature the plant cannot photosynthesise because the chlorophyll enzymes are damaged. Enzym ... plant cannot photosynthesise because the chlorophyll enzymes are damaged. Enzymes are denatured at high temperatures.Light: In the dark, plants cannot photosynthesise at all. In dim light, they can p ...

(10 pages) 63 0 4.0 May/2005

Subjects: Science Essays > Zoology


It may be obtained artificially from almost any organic substance by heating the substance to very high temperatures without air. Using this method, coke is produced from coal, and charcoal is produc ... less, and tasteless. It forms during the incomplete combustion of carbon (Kinoshita 215-223). It is highly toxic to animals because it inhibits the transport of oxygen in the blood by hemoglobin (WWW ...

(4 pages) 25 0 4.3 Oct/2005

Subjects: Science Essays > Earth Sciences

Enzyme substrate complex

of enzymatic reactions, this is complicated by the fact that many enzymes are adversely affected by high temperatures. As shown in Figure 13, the reaction rate increases with temperature to a maximum ... in human cells.Above this temperature the enzyme structure begins to break down (denature) since at higher temperatures intra- and intermolecular bonds are broken as the enzyme molecules gain even mor ...

(4 pages) 46 0 0.0 Mar/2006

Subjects: Science Essays > Biology

Anode tube

of the Stationary anode tube (pg168)Glass envelope; made from borosilicate glass in order to stand high temperatures. Also acts as an electrical insulator between the negative cathode and positive an ... um by thermionic emission. Tungsten is chosen as the filament material for the following reasons;1) High melting point (3387 degrees C)2) Low vapour pressure (about 5000kPa) Vapour pressure is the pre ...

(3 pages) 44 2 4.8 Apr/2006

Subjects: Science Essays > Physics

Assignment: Use "is" as little as possible

veal much; there's something for everyone to feel comfortable and refreshed in, especially with the high temperatures and the happy sun. A Hawaiiam outfit can never be complete without a lei. A wreath ...

(1 pages) 551 0 0.0 Oct/2006

Subjects: Literature Research Papers > Creative Writing

Investment Casting

e time of the Pharaohs to make gold jewelry some 5,000 years ago. Intricate shapes can be made with high accuracy. In addition, metals that are hard to machine or fabricate are good candidates for thi ... chniques, such as turbine blades that have complex shapes, or airplane parts that have to withstand high temperatures. Investment casting is not a new technique. The basic technique of investme ...

(5 pages) 7 0 0.0 Sep/2001

Subjects: Businesss Research Papers

Singapore Research Task

). It comprises of one main island and 57 smaller islands covering a total of 620km2. Singapore has high temperatures, humidity and rainfall all year round and is described as tropical. It has an open ... ong manufacturing sectors and excellent international trading. Here is. A world map (with Singapore highlighted) A Topographical Map of Singapore The Singaporean Flag Singapore has a population of 4,1 ...

(4 pages) 25 0 0.0 Oct/2001

Subjects: Businesss Research Papers

Air conditioning systems

though to air condition buildings is usually made to avoid exposure of human beings to excessively high temperatures, which in turn improves comfort / productivity, and also because people will not g ... building fabric has been increased since Georgian times. Occupation densities have increased due to high cost commercial space and modern businesses containing ICT have increased the internal heat gai ...

(2 pages) 18 0 3.0 Oct/2007

Subjects: Science Essays > Atmospheric Sciences

Water conservation in plants

lanceIntroduction: Many plants in Australia live in areas that experience very little rain and very high temperatures. Water loss occurs through the stomates in the leaves, but carbon dioxide uptake a ... Australian plants to suit Australian conditions. For example, I might find that plants will have a higher surface area to volume ratio because this helps in the prevention of water loss. I also think ...

(24 pages) 17 0 3.0 Jan/2008

Subjects: Science Essays > Biology > Plant Biology

The Rainforest

actor that affects this climate is latitude. The sun is overhead throughout the year and this gives high temperatures and is responsible for the convectional rainfall. There is no prevailing wind and ... has to adapt to the climate. By this we mean they have to learn to live with the heavy rainfall and high temperatures.These are the main ways that plants and trees have adapted to the climate: · ...

(16 pages) 89 0 5.0 Feb/2008

Subjects: Science Essays > Environmental Science

Basic Information about the sun         Since the birth of mankind,

billion years ago, as it began it's formation in a huge cloud of gases. As the materials condensed, high temperatures and great pressures built up at the center. These conditions set off a nuclear rea ... he sun is composed mostly of hydrogen with some helium, as well as a few other elements. Due to the high temperatures on the sun, there are no whole atoms, since these high temperatures would cause th ...

(7 pages) 15 0 0.0 Feb/2008

Subjects: Science Essays > Astronomy

Iimplications of Asbestos Discovery

ique properties of being resistant to abrasion, inert to acid and alkaline solutions, and stable at high temperatures. It is versatile, plentiful and ideal as a fire-proofing and insulation material ( ... ognised as being either to remove or encapsulate. The debate on which is the most valuable has been highly contested for many years with both arguments having advantages and disadvantages. If asbestos ...

(9 pages) 16 0 0.0 Feb/2008

Subjects: Science Essays > Environmental Science

Global Issues in the Environment and Extraction of Metals

e damage, and slow down photosynthesis. By having ozone, it protects living things from the harmful high-energy radiation from the Sun.What have humans done to damage it?Humans have damaged ozone by u ... used. For more stable metals, roasting is used. Roasting is the heating of ores in air.AdvantagesAt high temperatures, reactions are much faster than they are in slurries or in aqueous solutions.In su ...

(12 pages) 46 0 5.0 Feb/2008

Subjects: Science Essays > Chemistry

What is an alloy?

lloys, such as Nichrome, a nickel based alloy with 12-15% chromium and 25% iron, are very strong at high temperatures. They are used in power-generating plants, jet engines, and gas turbines. Alloys b ... ium system, are used in aircraft. Prosthetic devices, like artificial knees and hips, are made from high-strength, corrosion-resistant alloys that are usually based on iron, cobalt, or titanium.Many a ...

(2 pages) 2504 0 0.0 Jun/2008

Subjects: Science Essays > Chemistry

An essay on Natural Hazard; Storms and Black Saturday, Canberra, 2003

/pine corridors.) This fuel was tinder drydue to the prolonged drought. On the day of thefire, very high temperatures, strong winds andextremely low relative humidity turned theadvancing bushfire into ...

(2 pages) 2028 0 0.0 Jul/2008

Subjects: Science Essays > Earth Sciences > Geography


times gravity in very large diameter, low resistance cyclones to 2500 times gravity in very small, high resistance units. This forces heavier particles to the outer edges, while lighter particles rem ... clone separator is fairly simple to build and inexpensive. They also have the ability to operate in high temperatures and pressures.The flow stream enters the body of the separator tangentially throug ...

(6 pages) 21 1 5.0 Aug/2008

Subjects: Science Essays > Engineering > Chemical Engineering