by the Macedonians. On average‚ the depth of the phalanx appears to be about eight men deep. During the time of Alexander the Great‚ the phalanx was believed to be eight men deep‚ but some argue that it evolved into a sixteen man deep phalanx. The Spartans purposely varied the depth of their phalanx so to confuse the enemy about the number of soldiers fielded. The phalanx proved to be a very valuable weapon for the military at that time. Armies which did not adapt to the phalanx formation were quickly
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substances originating from living organisms‚ or artificial materials that are similar enough to plant and animal matter to be put to use by microorganisms ------------------------------------------------- ONE OPTION: BIODEGRADABLE Plastics Biodegradable plastic is plastic that has been treated to be easily broken down by microorganisms and return to nature. Many technologies exist today that allow for such treatment. Currently there are some synthetic polymers that can be broken down by microorganisms
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OCEAN PLASTICS POLLUTION: A GLOBAL TRAGEDY FOR OUR OCEANS AND SEA LIFE Plastic never goes away. And it’s increasingly finding its way into our oceans and onto our beaches. In the Los Angeles area alone‚ 10 metric tons of plastic fragments — like grocery bags‚ straws and soda bottles — are carried into the Pacific Ocean every day. Today billions of pounds of plastic can be found in swirling convergences making up about 40 percent of the world’s ocean surfaces. Plastics pollution has a direct and
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IMPORTANCE OF PLASTIC:- Plastics are a subset of materials known as Polymers. These are composed of large molecules formed by joining many smaller molecules together (monomers). Other kinds of polymers are fibres‚ elastomers‚ surface coating and biopolymers‚ such as cellulose‚ proteins and nucleic acids. Plastics owe their name to their ability to be shaped to form articles of practical value by various conversion and forming processes. These are some peculiar properties of plastics materials‚ which
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plastic-def. A plastic material is any of a wide range of synthetic or semi-synthetic organic solids that are moldable. Plastics are typically organic polymers of high molecular mass‚ but they often contain other substances. They are usually synthetic‚ most commonly derived from petrochemicals‚ but many are partially natural. Plastics Characteristics Plastics are made from fossil fuels--petroleum‚ natural gas‚ coal--‚ wood and some plant materials‚ air‚ water and sometimes other common materials
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From the time we hit our plastic alarm clock in the morning until the time we squeeze tooth paste out of its plastic sleeve onto our plastic tooth brush when we go to bed‚ we are surrounded by plastic. Our food is packaged in it‚ our children play with toys made from it‚ we talk on plastic cell phones‚ and we sit on chairs of plastic at work writing with plastic pens‚ drinking from plastic water bottles. Plastic is everywhere. Where does all this plastic end up? It does not just disappear when we
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How Spartan boys became Spartan warriors Imagine being taken away from your family and your home when you were just seven years old. The Spartans may have built one of the finest militaries of the ancient world‚ but their culture was so harsh that the word “Spartan” has become synonymous with an austere way of life. Spartan society was carefully constructed around a strict moral code and sense of duty‚ and its people underwent extreme hardships and deprivation on their way to becoming accepted
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A plastic material is any of a wide range of synthetic or semi-synthetic organic solids that are moldable. Plastics are typically organic polymers of high molecular mass‚ but they often contain other substances. They are usually synthetic‚ most commonly derived from petrochemicals‚ but many are partially natural.[1] A plastic material is any of a wide range of synthetic or semi-synthetic organic solids that are moldable. Plastics are typically organic polymers of high molecular mass‚ but they often
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decisive defeat of the Spartan hoplite army by the armed forces of Thebes at the battle of Leuctra in 371 B.C. ended an epoch in Greek military history and permanently altered the Greek balance of power. One by one‚ the old certainties of the ’Golden Age’ of the fifth century had been challenged and overthrown‚ but the image of Spartan military invincibility had‚ until this moment‚ remained a secure bastion. Once‚ the very sight and sound of an advancing line of Spartan soldiers had been enough
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