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 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.
A hot air balloon needs a flame to heat the air inside the balloon, making it less dense than the surrounding air. This temperature difference creates lift, allowing the balloon to float upwards. Without the flame, the air inside the balloon would cool down and the balloon would descend.
A hot air balloon rises due to the principle of buoyancy. The air inside the balloon is heated, which causes it to become lighter and less dense than the surrounding air. This difference in density creates lift, causing the balloon to float upwards.
A hot air balloon floats in the air because the air inside the balloon is heated, becoming less dense than the surrounding air. This creates a buoyant force that lifts the balloon. As long as the air inside the balloon remains hotter than the surrounding air, the balloon will continue to float.
A hot air balloon requires air to generate lift. In outer space, there is no air or atmosphere, so there is nothing for the hot air balloon to displace to generate lift, causing it to be unable to float.
Because it heats the air and of course the hot air will rise above the cold air causing it to float!
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.
A hot air balloon needs a flame to heat the air inside the balloon, making it less dense than the surrounding air. This temperature difference creates lift, allowing the balloon to float upwards. Without the flame, the air inside the balloon would cool down and the balloon would descend.
Heating the air inside the balloon makes it less dense than the surrounding air, causing the balloon to float upwards. As the air inside the balloon cools, it becomes denser and the balloon descends. The pilot can control the altitude by adjusting the temperature of the air inside the balloon.
A hot air balloon rises due to the principle of buoyancy. The air inside the balloon is heated, which causes it to become lighter and less dense than the surrounding air. This difference in density creates lift, causing the balloon to float upwards.
A hot air balloon floats in the air because the air inside the balloon is heated, becoming less dense than the surrounding air. This creates a buoyant force that lifts the balloon. As long as the air inside the balloon remains hotter than the surrounding air, the balloon will continue to float.
For a balloon to float in the air, it must be filled with a gas that is lighter than the surrounding air, such as helium or hot air. This creates a buoyant force that allows the balloon to rise and float.
A hot air balloon requires air to generate lift. In outer space, there is no air or atmosphere, so there is nothing for the hot air balloon to displace to generate lift, causing it to be unable to float.
A hot air balloon floats because the air inside the balloon is heated, which makes it less dense than the surrounding air. This lower density air creates lift, allowing the balloon to rise. The balloon will continue to float as long as the air inside remains heated.
Helium gas is commonly used to make balloons float. Helium is lighter than air, so filling a balloon with helium makes it buoyant and able to float.
Going up!Hot air is actually less dense than cold air. So, in turn the hot air rises causing the balloon to float up.Because hot air has a lower density than cold air, causing hot air to rise. When the hot air is trapped in a balloon, the push of the rising air causes the balloon to float.
Just the density difference between the balloon and surrounding atmosphere is so great that the balloon is able to lift itself and people.