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Tires
A tire (American English) or tyre (British English)[1] is a ring-shaped vehicle component that covers the wheel’s rim to protect it and enable better vehicle performance. Most tires, such as those for automobiles and bicycles, providetraction between the vehicle and the road while providing a flexible cushion that absorbs shock.
The materials of modern pneumatic tires are synthetic rubber, natural rubber, fabric and wire, along with carbon blackand other chemical compounds. They consist of a tread and a body. The tread provides traction while the body provides containment for a quantity of compressed air. Before rubber was developed, the first versions of tires were simply bands of metal that fitted around wooden wheels to prevent wear and tear. Early rubber tires were solid (not pneumatic). Today, the majority of tires are pneumatic inflatable structures, comprising a doughnut-shaped body of cords and wires encased in rubber and generally filled with compressed air to form an inflatable cushion. Pneumatic tires are used on many types of vehicles, including cars, bicycles, motorcycles, buses, trucks, heavy equipment, and aircraft. Metal tires are still used on locomotives and railcars, and solid rubber (or other polymer) tires are still used in various non-automotive applications, such as some casters, carts, lawnmowers, and wheelbarrows.
Norman
Norman /ˈnɔːrmən/ is a city in the U.S. state of Oklahoma 20 miles (30 km) south of downtown Oklahoma City in its metropolitan area. The population was 110,925 at the 2010 census.[1] Norman’s estimated population of 120,284 in 2015 makes it the third-largest city in Oklahoma, and the city serves as the county seat of Cleveland County.
Norman was settled during the Land Run of 1889, which opened the former Unassigned Lands of Indian Territory to American pioneer settlement. The city was named in honor of Abner Norman, the area’s initial land surveyor, and was formally incorporated on May 13, 1891. Economically the city has prominent higher education and related research industries, as it is the home to the University of Oklahoma, the largest university in the state, with approximately 30,000 students enrolled. The university is well known for its sporting events by teams under the banner of the nickname “Sooners,” with over 80,000 people routinely attending football games. The university is home to several museums, including the Fred Jones Jr. Museum of Art, which contains the largest collection of French Impressionist art ever given to an American university, as well as the Sam Noble Oklahoma Museum of Natural History.
The National Weather Center, located in Norman, houses a unique collection of university, state, federal, and private sector organizations that work together to improve the understanding of events related to the Earth’s atmosphere. Norman lies within Tornado Alley, a geographic region where tornadic activity is particularly frequent and intense. The Oklahoma City metropolitan area, including Norman, is the most tornado-prone area in the world. The Storm Prediction Center (SPC), a branch of the National Oceanic and Atmospheric Administration (NOAA) is located at the NWC. SPC forecasts severe storm and tornado outbreaks nationwide. Additionally, research is conducted at the co-located National Severe Storms Laboratory (NSSL), which includes field research and operates various experimental weather radars.
In 2008, CNN‘s Money Magazine ranked Norman as the sixth best small city within the United States to live in.