To increase enthalpy.
the burner uses flames to heat the air so the balloon will rise
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.
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.
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.
A hot air balloon is a machine that allows people to fly. It is comprised of a gigantic balloon attached to a basket where people stand. Under the balloon is a gas burner that lets out a large flame. The flame fills the balloon with heat, expanding it and enabling it to fly.
Propane. This is what makes the flame that heats the air in the balloon.
That flame is the source of heat for the hot air in the hot air balloon.
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.
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.
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.
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.
The air inside a hot air balloon is the same as normal air around the balloon and the air you're breathing, only heated by the flame inside the balloon, hence HOT AIR balloon.
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 is a machine that allows people to fly. It is comprised of a gigantic balloon attached to a basket where people stand. Under the balloon is a gas burner that lets out a large flame. The flame fills the balloon with heat, expanding it and enabling it to fly.
Propane. This is what makes the flame that heats the air in the balloon.
The piece of equipment that put the flame up into the balloon is called the 'burner' in most parts of the world. It is also sometimes called a 'heater'.
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.
hot air balloons work the best in cold temperature. the reason why is because if the outside temperature is close to the temperature in the hot air balloon, it will be as if the flame isn't on. if it is cold outside, the flame makes a much bigger impact and the balloon will go up faster.