Essays Tagged: "Metals"

The Shield of Achilles. From the Illiad.

nty hot bellows and fires bronze, tin, gold, and silver in his kiln. He then proceeds to hammer the metals upon his anvil to create a massive shield for Achilles to wield. The shield itself is made of ...

(3 pages) 148 0 3.8 Nov/1994

Subjects: Humanities Essays > Classical Studies


a, and the Philippines. The United States importsalmost all its chromite.Chromium is added to other metals to make them harder andmore resistant to chemicals. Small quantities mixed with steel make th ... by adding smallquantities of chromium to it. Chromium steel alloys (mixtures containing oneor more metals) are used to make armor plating for tanks and warships. Theyare also used for ball bearings a ...

(2 pages) 39 0 4.6 Jan/1996

Subjects: Science Essays > Physics

heavy metals

Anthropogenic sources of metals can have severe and obvious impacts on the local environment, but signs of environmental chan ... e high enough to raise health concerns? In spite of such uncertainties, one message is clear: these metals matter because they accumulate in the bodies of Arctic animals and hence become available to ... ble to humans who depend on wildlife for their survival.This chapter discusses the sources of heavy metals in the Arctic environment and describes their levels in air, sediment, water, and biota. Base ...

(37 pages) 201 0 4.4 Apr/2002

Subjects: Science Essays > Biochemistry

Copper and Molybdenum Deposits in the United States

of tools because of its malleability and later became an important additive in harder, more useful metals such as bronze (copper+tin; 2500 B.C.) and brass (copper+zinc; 0 A.D.). The growth of copper ...

(11 pages) 45 0 3.8 Dec/1996

Subjects: Science Essays > Earth Sciences > Geography

Mechanical Enginearing

for man. This overview would include steel and concrete for buildings, roads, and dams, the use of metals glass and plastics for hundreds of every day products, the use of electricity, and the harnes ...

(2 pages) 87 1 3.6 Nov/1996

Subjects: Science Essays > Engineering > Chemical Engineering

Who are the Celts?

use probably looked like a thatched log cabin surrounded by a stockade. They didn't trade much, but metals - especially bronze and iron - were rare and precious, and were probably traded. Women seemed ... use probably looked like a thatched log cabin surrounded by a stockade. They didn't trade much, but metals - especially bronze and iron - were rare and precious, and were probably traded. Women seemed ...

(20 pages) 157 0 3.0 Nov/1996

Subjects: History Term Papers > European History


never be broken down into differnet substances bynormal chemical means. Copper was one of the first metals known to humans.People liked it because in it's native condition, it could easily be beaten i ... e condition, it could easily be beaten intoweapons or tools. Copper has been one of the most useful metals for over5000 years. Copper was probably used around 8000 B.C by people livingalong the Tigris ...

(3 pages) 45 0 4.0 Feb/1997

Subjects: Science Essays > Chemistry

Cash Crops: The Devastation of Latin America. L.A.contains two valuable commodities,one being cocaine,and sugar, the people will continue to suffer due to the lack of distribution of wealth

h countries pro-ducing sugar have seen some prosperous times it has been at a great cost.Originally metals, such as gold and silver, were what the Spaniards were original after and therefore sugar can ...

(4 pages) 569 12 4.3 Mar/2003

Subjects: Area & Country Studies Essays

Timeline of Elements?

chemists used Ancient Art, during the middle Ages, to discover a substance that would change common metals to gold or silver.*442 BC: Democritus came up with the theory of atoms, and also he stated th ...

(2 pages) 34 0 3.0 Mar/2003

Subjects: Science Essays > Chemistry

"The Crucible" by Arthur Miller.

llels with McCarthyism.In medieval times, alchemists used crucibles to separate gold from different metals. Miller's choice of The Crucible as the title of the play is symbolic. During the witch-hunt ...

(6 pages) 86 0 3.3 Jul/2003

Subjects: Literature Research Papers > North American

Metallic and Ionic bonding.

Metals:-Good conductors of electricity-Good conductors of Heat-Lustrous or reflective when freshly c ... ire-Exihibit a range of melting and boiling temperatures-Generally have high densitiesExceptions in metals:-Mercury ? liquid at room temperature, unusually low melting point.-Chromium ? brittle rather ... oom temperature, unusually low melting point.-Chromium ? brittle rather than malleable.Structure of MetalsModel of metal in solid state must be one in which:-Some of particles are charged and free to ...

(5 pages) 46 0 2.0 Sep/2003

Subjects: Science Essays > Chemistry

Aluminum. Number

ngs, from soft-drink cans to car bodies to window frames. Aluminum is grouped with other soft, weak metals such as copper and tin that scientists refer to as "poor" metals. But mixtures of aluminum an ... uch as copper and tin that scientists refer to as "poor" metals. But mixtures of aluminum and other metals (alloys) can create metals as strong as steel.Wohler is generally credited with having isolat ...

(3 pages) 93 2 4.4 Oct/2003

Subjects: Science Essays > Chemistry

An essay explaining how the word "crucible" is an appropriate title for this play, and how the characters are reduced to their essences and tested.

of 1692. The word "crucible" is defined as "a severe test" or "a container for melting or purifying metals." The title of this play is incredibly appropriate because the charactersin the play were fac ...

(1 pages) 51 1 4.0 Oct/2003

Subjects: Literature Research Papers > North American

The predecessor or modern chemistry writen by Jay Abgumme

f alchemy stemmed from Aristotle's doctrine that all things tend to reach perfection. Because other metals were thought to be less perfect than gold, it was reasonable to believe that nature created g ... ht to be less perfect than gold, it was reasonable to believe that nature created gold out of other metals found deep within the earth and that a skilled artisan could duplicate this process. It was s ...

(3 pages) 30 0 3.7 Nov/2003

Subjects: Social Science Essays

Experiment to describe reactivity of a given set of metals.

Experiment to Determine the order of Reactivity for a given set of MetalsPredictionI predict that the order of reactivity for the given set of metals will be Sodium, M ... use 4 of the 5 solutions (exclude the metal which is the same as one of the materials)2.For all the metals (except sodium which requires an adult to perform) place them in a small amount of the liquid ...

(1 pages) 30 0 3.0 Jan/2004

Subjects: Science Essays > Chemistry

Metals in the Bronze Age

It is commonly supposed that metals, and especially copper, were one of the most-traded goods in the Bronze Age period. This is l ... Mycenaean Greece, were not well provided with metal ores, and therefore had to import most of their metals. Some of the most important copper resources were Cyprus, Central Italy and Sardinia. Therefo ... served as a part of an 'international emporium' or as a 'gateway community' through which trade in metals and ceramics was conducted with eastern Mediterranean (Smith 1987:143). This scenario, accord ...

(10 pages) 57 0 4.3 Mar/2004

Subjects: Area & Country Studies Essays

This is a technical product description of a fire extinguisher.

ing. Class C fires are those involving live electrical equipment. Class D fires involve combustible metals such as magnesium, potassium, and sodium. Each class of fire requires its own type of fire ex ...

(4 pages) 53 0 3.0 Mar/2004

Subjects: Science Essays

Toyota's Objectives in Global Automotive Industry

onsible for more than 100,000 jobs in each of several industries, including dealerships, fabricated metals, auto parts, auto repair and maintenance, road construction, tire dealerships, fueling statio ...

(5 pages) 465 1 3.8 May/2004

Subjects: Businesss Research Papers > Markets & Exchanges

Year 12 Chemistry Preliminary Assessment Task 2: The Chemical Earth And Metals

ay ahead of the compettion and find out as much as they can about the historical and current use of metals. This knowledge helps the company when they are deciding which metals should be used for the ... used in a piping for air conditioning units and car radiators. Copper is one of the most important metals because of its ability to turn into over one thousand different alloys.Describe one current d ...

(11 pages) 80 0 4.8 Jun/2004

Subjects: Science Essays > Chemistry

Compare the operation of three cases:"I will phone you back","London zoo" and "Executive holloware"

ed [7].Executive Holloware": the transformed resources are the raw materials. The company uses some metals such as pewter and stainless steel to product top quality hollowware.I will phone you back: t ...

(9 pages) 125 0 5.0 Aug/2004

Subjects: Businesss Research Papers > Case Studies