using hot air.
Whether in a liquid or in air or a specific gas, everything has a force pushing it up that is equal to the weight of the liquid or gas that the thing displaces. For example, if you put a cube measuring one cubic foot into water, the water would exert on the cube an upward force equal to the weight of a cubic foot of water, which is 62.4 pounds for pure water. While that cube is out of the water, the air exerts an upward force on the cube equal to the weight of a cubic foot of air at sea level.
To get a hot air balloon off the ground, the air inside the balloon is expanded by heating until the combined weight of the expanded air, the balloon itself, and everything hanging below it is less than the weight of the same volume of the cooler air outside the balloon.
the buoyancy
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.
Hot air balloons do not have heating systems, so the temperature inside a hot air balloon is the same as the surrounding air. Passengers may feel warmer as the balloon rises due to sunlight or if the burner is operating. It is advisable to dress in layers to stay comfortable during the flight.
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.
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.
As long as they have flue to heat the balloon.
the buoyancy
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 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 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.
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.
Hot air balloons do not have heating systems, so the temperature inside a hot air balloon is the same as the surrounding air. Passengers may feel warmer as the balloon rises due to sunlight or if the burner is operating. It is advisable to dress in layers to stay comfortable during the flight.
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.
If it was tied to a hot air balloon it could. Otherwise no.
As the flame burns it heats the air around it making the air less dense than the cooler air above, the warm air particles rise to the top of the balloon and the balloon rises with the air. Essentially a hot air balloon uses a convection current to stay in the air.
A hot air balloon flies because it is filled with hot air. Hot air rises and causes the balloon to lift from the ground.