As long as they have flue to heat the balloon.
A hot air balloon can stay in the air because the hot air is less dense than cool air. The hot air that is blown into the balloon causes it to rise and a burner is used to heat the air inside of the balloon to keep it floating.
the buoyancy
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
I presume you mean without an airborne heater. The answer is, there is no fixed time! It could range from a few minutes to the best part of a day. It all depends on the rate the balloon loses heat, which in turn depends on the size of the balloon, the weight of the balloon, the insulation and porosity properties of the balloon fabric, and the amount of solar heating, if any, that it receives.
i think it takes a long time for a hot air balloon to fly
A hot air balloon stays up because hot air is less dense than cold air. When the air inside the balloon is heated by the burner, it becomes lighter and causes the balloon to float upwards. By controlling the temperature inside the balloon, the pilot can control the altitude.
A hot air balloon stays afloat because hot air inside the balloon is less dense than the surrounding cooler air, creating lift. As the air inside the balloon is heated, it expands and becomes lighter, causing the balloon to rise. By controlling the amount of hot air in the balloon, the pilot can control the altitude.
A hot air balloon uses buoyancy to stay in the air. The air inside the balloon is heated, making it less dense than the surrounding air, causing the balloon to float.
For as long as it can provide hot air.
The question is not well-formed. Similar questions may include: How many minutes does a helium balloon stay aloft? How long does a hot air balloon stay aloft? How long does a particular rocket motor burn?
Hot air balloons rise because the air inside the balloon is heated, making it less dense than the cooler air outside. This difference in density creates buoyancy, allowing the balloon to lift. Once the desired altitude is reached, the pilot can maintain the balloon's height by carefully controlling the temperature of the air inside, either by adding or releasing hot air. As long as the internal air remains warmer than the outside air, the balloon will stay afloat.
A hot air balloon needs hot air to rise. In colder air, the balloon loses its buoyancy and cannot generate enough lift to stay airborne. Cold air is denser and heavier, which makes it harder for the hot air balloon to ascend.