Yes. low tire pressure on tires create more resisitance, therefore causes the engine to work harder, thus using more gas.
they hit the walls/side of the tyre and that builds pressure
Tyre pressure is caused by the air particles inside the tyre
You should not reduce tire pressure just because you are going to be on a long roadway. You should set the pressure to the cold pressure as specified by the vehicle and tire manufacturers and you should leave it alone. It is normal for the pressure to increase when the tire is hot. DO NOT bleed it off. This will cause the tire to overheat and potentially cause it to fail, possibly with catastrophic consequences. Alwaysadjust pressure when the tire is cold.
Pressure is equal throughout the tire.
Not typically, but running a tire with low pressure can cause damage to the tire, making it dangerous to drive and causing the tire to become out of balance. A front end vibration (sometimes called a shimmy) is typically caused by an out of balance tire.
Air pressure is the same throughout the tire.
No. A car will get better mileage with the correct tire pressure.
Tire pressure depends on the tire. The pressure recommendation that come with the car are for the specific type, size and rating that came on the car.
If inside and outside same pressure that means there is no pressure. The added pressure is what blows the tire up like a balloon and holds the weight of the car up.
The maximum tire pressure is printed on the tire. Try looking in the car's manual for the correct pressure.
The door: the number on the tire is its maximum pressure, the number on the load sticker in your car is specific to the car and is set to maximize efficiency, braking, and handling for your vehicle.
The air molecules bouncing around off the inside of the tire. If you force something into a confined space that is usually allowed to be free it will exert pressure(Force) on th walls of it's container. An increase in tire temperature or friction will cause the air pressure to increase while colder temperatures will cause it to decrease.