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20 Inch Smoothie Wheels - A wheel is usually a circular ingredient that is intended to rotate for an axle bearing. The wheel is several parts of the wheel and axle which are probably the six simple machines. Wheels, together with axles, allow heavy objects to generally be moved easily facilitating movement or transportation while supporting lots, or performing labor in machines. Wheels will also be useful for other purposes, perhaps a ship's wheel, wheel, potter's wheel and flywheel.Common examples are only in transport applications. A wheel greatly reduces friction by facilitating motion by rolling together by using axles. In order that wheels to rotate, a short while really should be relevant to the wheel about its axis, either by using gravity or by the effective use of 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 prolonged sort of the source *kwel- "to revolve, move around ".Cognates within Indo-European include Icelandic hjól "wheel, tyre", Greek κύκλος kúklos, and Sanskrit chakra, ppos both meaning "circle" or "wheel ".Precursors of wheels, labeled "tournettes" or "slow wheels", were known during the Middle East through the 5th millennium BCE (one of the initial examples was discovered at Tepe Pardis, Iran, and dated to 5200–4700 BCE). These were built from stone or clay and secured down along with a peg within the center, but required effort to turn. True (freely-spinning) potter's wheels were apparently utilised in Mesopotamia by 3500 BCE and perchance since 4000 BCE, along with the oldest surviving example, which had been seen in Ur (modern day Iraq), dates to approximately 3100 BCE.


The initial evidence of wheeled vehicles appears inside the partner on the 4th millennium BCE, near-simultaneously in Mesopotamia (Sumerian civilization), the Northern Caucasus (Maykop culture) and Central Europe (Cucuteni-Trypillian culture), so that the question which culture originally invented the wheeled vehicle 's still unsolved.The first well-dated depiction of your wheeled vehicle (here a wagon — four wheels, two axles) is for the Bronocice pot, a c. 3500 – 3350 BCE clay pot excavated inside 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) becomes 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 version of wagon construction (the wheel and axle rotate together, as in Ljubljana Marshes Wheel), and this from the Baden culture in Hungary (axle just isn't going to rotate). They both of them are dated to c. 3200–3000 BCE.In China, the wheel was certainly present with all the adoption for the chariot in c. 1200 BCE,although Barbieri-Low[9] argues for earlier Chinese wheeled vehicles, c. 2000 BC.

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TITLE:	PopScreen Video Search, Bookmarking and Discovery Engine
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