It's a gas.
The same as the air outside the tyre.
Air in a tire is compressed air. Compressed from the weight of the vehicle and against itself in the tire.
Because the air inside the tire is under pressure. Gas always flows from a region of higher pressure to a region of lower pressure. As the pressure inside the tire is greater than the pressure outside, the air always comes out of the bicycle tyre.
There is no gas in a tire pump, only air.
gas
It's a gas that is inside a liquid (the bubble is the liquid).
It's a gas that is inside a liquid (the bubble is the liquid).
In Connecticut businesses can not charge for tire air.
Well, it all depends on what you are considering. You may be talking about the shell/body of the aeroplane which is solid, the fuel for instance which may be considered as liquid/gas, or the gas (air) inside the aircraft as gas
Any tire inflated with a gas (air or nitrogen ) is a pneumatic tire.
Any tire inflated with a gas (air or nitrogen ) is a pneumatic tire.