yeast! people why are you sooooo stupid?
ii dont know
-- Inflate the balloon with some substance that is less dense than air. OR -- Inflate the balloon with air, then heat it after it is sealed.
Inflate it with water.
Hydrogen is not used to inflate hot air balloons. Just regular air is used which is then heated to make the balloon more buoyant as hot air weighs less than cold air. Hence the name hot air balloons.
To inflate the balloon. Whether the gas is helium or just air from your lungs, gases are needed to inflate the balloon.
Depends on the size but typically ten to twenty minutes
The hot water heats the air in the system, causing it to expand.
The pilot of a hot air balloon uses the burners to move in different directions. Some of the air is moving east, while some of the air is moving west. The pilot of the balloon will either deflate or inflate the balloon to catch the wind in a particular direction.
Hot air balloons generally fly better with a little breeze, they don't fly well in hot weather.
'Hot air' balloons don't use hydrogen. They use hot air. Balloons that use hydrogen are not referred to as 'hot air' balloons. The only balloons that can accurately be referred to as 'hot air' balloons are the members of the balloon population that derive their lift/buoyancy from the presence of hot air. Of course, if a balloon used no hot air, then it could freely be referred to as a 'hydrogen' balloon, a 'helium' balloon, a 'water' balloon, etc., depending in congruent harmony with the nature of whatever substance had been chosen with which to inflate it it in order to maintain its fulsome shape.
The hot water heats up the air inside the bottle, causing it to expand, forcing some of the air out of the bottle and into the balloon, causing it to inflate. The larger the bottle, the more air that will be pushed into the balloon. The air in the balloon will quickly cool and, since hot air is less dense and therefore rises, the cooler air is forced back into the bottle to be heated up. Eventually the air will be a constant temperature and the balloon will reach the limit of inflation. As the water cools, the air cools and the balloon begins to deflate.