Oxygen is the only gas used by humans for respiration.
If it is already a gas, it does not need to evaporate.
Air is a gas. You would need to specify what gas, like helium or carbon dioxide.
Rooms with a gas fire place need fresh air because the gas and the fire put off too much carbon monoxide. The fresh air will keep you from getting carbon monoxide poisoning.
Yes, because a gas gun dosent have a spring
Simple, to remove the air so the gas will reach the appliance
The air around us help us to breath it carries to the gas that we need but it can also carry bad gases but that is unlikely. the gas we need are oxygen,nitrogen and carbon dioxide.
You needed to take a gas mask in case their was a gas attack.
oxygen
Because all living things need a form of gas exchange.
In order to combust you need heat, oxygen and fuel (like diesel in a car or in the case of a Bunsen burner a gas). Therefore Oxygen from the air burns with a gas such as Methane(the gas that can come out of both our and cows' bottom's - hence the stench!!)I hope that helps!
They need not be longitudinal; but in the case of the sound we usually hear (in air) this is due to the fact that air is a gas.
Water Vapor