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The flame heats the air contained in the balloon. This causes the air to expand, thus it becomes less dense than the air surrounding the balloon. Once the air in the balloon is sufficiently less dense than the surrounding air to overcome the weight of the balloons materials, it will lift into the air.

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Q: How does the flame in an hot air balloon enable the balloon to float in the air?
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How is a hot air balloon able to float with a flame?

As to the reason a hot air balloon floats has already been explained, I will answer your question regarding the flame. The gas burner provides the flame which is placed just in the mouth of the ballon, when lit it provides more heat to the cooling air in the balloon causing the balloon to maintain altitude.


How does a hot air balloon go in the air?

Well it has a gas fueled flame and the flames heat makes the balloon part fill up with hot air. Hot air rises so the hot air balloon will float into the sky like a helium balloon would.


Why can't a hot air balloon float in outer space?

The key word there is float. There is nothing in space for a hot air balloon to float on.


Why does a hot air balloon need flame in order to take off?

A Balloon needs hot air to rise, the flame, which is gas burning, heats up the air in the balloon. As Hot air rises above cooler air the balloon takes off.


How does a hot air balloon gain altitude?

Altitude is controlled by the propane burner and the parachute valve. The parachute valve is an opening at the top of the balloon envelope. When closed, it traps hot air from the burner inside the balloon, making the hot air balloon rise. When opened, it allows hot air to escape, and the hot air balloon descends. The reason a hot air ballon rises is because the density of the balloon is less than the density of the surrounding air. Its the same thing as "why does a boat float". In the case of the balloon, the operator modulates the flame on and off to maintain the desired altitude - increase the flame, and the balloon goes up - decrease or shut off the flame, and the balloon goes down. A better metaphor to a boat is a submarine - add ballast and the submarine goes down - blow ballast and the submarine goes up.

Related questions

How does a flame enable a hot air balloon to float?

Because it heats the air and of course the hot air will rise above the cold air causing it to float!


How is a hot air balloon able to float with a flame?

As to the reason a hot air balloon floats has already been explained, I will answer your question regarding the flame. The gas burner provides the flame which is placed just in the mouth of the ballon, when lit it provides more heat to the cooling air in the balloon causing the balloon to maintain altitude.


How does a hot air balloon go in the air?

Well it has a gas fueled flame and the flames heat makes the balloon part fill up with hot air. Hot air rises so the hot air balloon will float into the sky like a helium balloon would.


In a hot air balloon air is heated by a flamehow does this enable the balloon to float in the air?

Air, like any other substance has weight, that weight is directly related to its density. The warmer the air is the less dense it is therefore the lighter it is. A balloon full of lighter air will float upward just like a piece of wood in a swimming pool, the wood is less dense than the water.


Why can't a hot air balloon float in outer space?

The key word there is float. There is nothing in space for a hot air balloon to float on.


Why do hot air balloons float in the air?

Hot air rises and the fire in the hot air balloon wants to go up and float in the air and since it's can't escape the balloon the fire just brings the balloon with it to float in the air


Why does a hot air balloon need flame in order to take off?

A Balloon needs hot air to rise, the flame, which is gas burning, heats up the air in the balloon. As Hot air rises above cooler air the balloon takes off.


Can you make a balloon that float in air?

Fill a balloon part way with helium, make an animal out of it and have it float.


Why doesnt a balloon float with your air?

The air from your lungs has the same density as the air in our atmosphere. As a result a balloon inflated by a human using their lungs is unable to float.


Why do balloons filled with air not float?

Because air is not as dense as helium filed gallons so they won't float


Inflate a balloon and tie it closed hold it over the flame observe what happens?

If a balloon is inflated and tied closed, then held over a flame, it will surely pop. The heat of the flame will melt the rubber that makes the balloon.


How does heilum make a balloon float?

Heilum combined with the light material of the balloon make it as light as air making it float.