Project: Page 59
20 Inch Smoothie Wheels - A wheel is often a circular component that is intended to rotate when using axle bearing. The wheel is one of the many different parts of the wheel and axle which are probably the six simple machines. Wheels, along side axles, allow heavy objects to be moved easily facilitating movement or transportation while supporting a lot, or performing labor in machines. Wheels may be for other purposes, perhaps ship's wheel, wheel, potter's wheel and flywheel.Common examples are normally found in transport applications. One of the wheels greatly reduces friction by facilitating motion by rolling together currency axles. To ensure wheels to rotate, a flash has to be applied to the wheel about its axis, either as a result of gravity or by using another external force or torque.The English word wheel hails from the Old English word hweol, hweogol, from Proto-Germanic *hwehwlan, *hwegwlan, from Proto-Indo-European *kwekwlo-, a long-term style of the basis *kwel- "to revolve, maneuver ".Cognates within Indo-European include Icelandic hjól "wheel, tyre", Greek κύκλος kúklos, and Sanskrit chakra, ppos both meaning "circle" or "wheel ".Precursors of wheels, often called "tournettes" or "slow wheels", were known with the Middle East through 5th millennium BCE (one of the initial examples was discovered at Tepe Pardis, Iran, and dated to 5200–4700 BCE). Just read was fabricated from stone or clay and secured to the ground using a peg during the center, but required effort to turn. True (freely-spinning) potter's wheels were apparently available in Mesopotamia by 3500 BCE and possibly around 4000 BCE, along with the oldest surviving example, which has been in Ur (modern day Iraq), dates to approximately 3100 BCE.The initial evidence of wheeled vehicles appears during the better half of one's 4th millennium BCE, near-simultaneously in Mesopotamia (Sumerian civilization), the Northern Caucasus (Maykop culture) and Central Europe (Cucuteni-Trypillian culture), therefore,the question of which culture originally invented the wheeled vehicle will be unsolved.The earliest well-dated depiction from the wheeled vehicle (here a wagon — four wheels, two axles) is to the Bronocice pot, a c. 3500 – 3350 BCE clay pot excavated within a Funnelbeaker culture settlement in southern Poland.The oldest securely dated real wheel-axle combination, that from Stare Gmajne near Ljubljana in Slovenia (Ljubljana Marshes Wooden Wheel) is now dated in 2σ-limits to 3340–3030 BCE, the axle to 3360–3045 BCE.2 kinds of early Neolithic European wheel and axle are known; a circumalpine style of wagon construction (the wheel and axle rotate together, what i mean Ljubljana Marshes Wheel), and therefore with the Baden culture in Hungary (axle will not rotate). They are both dated to c. 3200–3000 BCE.In China, the wheel was certainly present together with the adoption in the chariot in c. 1200 BCE,although Barbieri-Low[9] argues for earlier Chinese wheeled vehicles, c. 2000 BC.
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TITLE: | Project: Page 59 |
IMAGE URL: | http://i124.photobucket.com/albums/p24/rolemodelcc/94%20C1500/qcs015_zpsd5c31998.jpg |
THUMBNAIL: | https://tse2.mm.bing.net/th?id=OIP.PW2IlqdRoDpNzyg-_SQ_iAEsDh&pid=Api&w=240&h=181 |
IMAGE SIZE: | 45085 B Bs |
IMAGE WIDTH: | 642 |
IMAGE HEIGHT: | 482 |
DOCUMENT ID: | OIP.PW2IlqdRoDpNzyg-_SQ_iAEsDh |
MEDIA ID: | A088E56B78244D93B28ACB0E9B152E867C4DDEF2 |
SOURCE DOMAIN: | gmt400.com |
SOURCE URL: | http://gmt400.com/forum/showthread.php?8623-project/page59 |
THUMBNAIL WIDTH: | 240 |
THUMBNAIL HEIGHT: | 181 |
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