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Air expands when it is heated. This makes it less dense than colder air. Hence, it has buoyancy, and tends to rise. If it is trapped in a balloon, it can take the balloon up with it, along with things attached to the balloon, as long as the buoyancy of the balloon exceeds the attached weight.
air is heavier than balloon, air rises
Assuming you mean hot air balloon piloted license, it depends. There are three different stages of it, student, private, an commercial. Each take about a year to obtain
The volume of air increases on its heating hence the balloon rises on heating
-- 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.
it took about a year for the first hot air balloon to be made.
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Air expands when it is heated. This makes it less dense than colder air. Hence, it has buoyancy, and tends to rise. If it is trapped in a balloon, it can take the balloon up with it, along with things attached to the balloon, as long as the buoyancy of the balloon exceeds the attached weight.
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air is heavier than balloon, air rises
Assuming you mean hot air balloon piloted license, it depends. There are three different stages of it, student, private, an commercial. Each take about a year to obtain
As long as they have flue to heat the balloon.
Heating the air makes less air take up the same space, so the air inside the balloon is lighter than the surrounding air. The pilot turns off the burner to help the balloon to maintain the current altitude or to descend.
to fly that far in a hot air balloon it would take up to at least over 15-30 days but that also depends on how fast you get the hot air balloon to fly and if you stay straight on course
to make a hot air balloon rise you use hot air
The volume of air increases on its heating hence the balloon rises on heating
Because the air in the balloon make it float in the atmosphere.