Nitrogen
slick tyres are used.
Air is used to inflated car tyres but cars can be equipped with nitrogeon inflated tyres but this is usually only beneficial to race cars
Many industrial supply companies will sell you compressed tanks of dry nitrogen that would be suitable for tires. For normal auto tires, regular air is fine, but nitrogen is often used to inflate the tires of race cars and airplanes.
nitrogeon is used to inflate race car tyres due to the consistent tyre pressure throughout different tempertures.
Nitrogen is not always used in tubeless tyres, but it is quite common to use nitrogen to fill tyres from race cars, this is because nitrogen is lighter than air, therefore creating less centrifugal force when the wheel rotates at high speed.
front tyres
There are different types of tires depending on what kind of racing they're doing. But pretty much all racing tires tries to be grippier than regular tires. This usually means that they wear out faster, and create more road noise than regular tires, which no one really cares about if can win them the race.
Slicks.
nitrogen
It's nitrogen.
Compressed air or compressed nitrogen.
No, they do not. Manual transmissions are used in Nascar race cars.