In order to make them aerodynamic so that wind resistance is kept to a minimum.
Depends on what car it is, and where the car is made
Mostly motorcycle and cars manufacturing companies use Carbon fiber and Aluminum.
no it is not it just got made for cars 1 and 2
Weld wheels are made for drag racing and sprint cars. Such wheels were made to be resistant from heat and other elements. Weld wheels were invented in 1967.
Some cars such as Rolls Royces and Maybachs are made by hand to ensure perfection and some cars like Bentlys and Bugattis are made by hand because the shape is to complex for a machine but most normal cars are not.
Cars are made of solid material because any other state of matter would be impractical for this application. Fluids like water are unable to hold a shape, but instead fit the shape of their container. If a car was made of fluid, it would lose its shape immediately, and would be un-drivable.
The same reason every other auto manufacturer made (makes) race cars - to further development of their retail vehicles. Ever hear of the saying, "Win on Saturday, sell on Monday?"
usually, racing slicks made by Goodyear or Firestone, if its a wet track rain tires.
as a mass production car, no it is not. Like most other cars it has to be upgraded before it could stand a chance.
Most of it is done on fluid dynamic software and then models are made for wind testing.
Race cars were made to make the sport NASCAR to show off driving skills, earn money, and to make a living.
Racing car tyres are made of very soft rubber. This gives them much better traction on the roadway, but they wear away very quickly.