Generally, it would be equipment failure by virtually any condition; weather, breakage, lack of hot air, etc.
A hot air balloon does not depend on thrust like an airplane does. It rises due to the buoyancy of the hot air inside the envelope, which is lighter than the surrounding air. Drag does affect the balloon's movement and control, but it is not the primary force that allows it to float.
If the air inside a hot air balloon cooled down, the density of the air would increase, causing the balloon to lose its buoyancy. As a result, the balloon would begin to descend. To maintain altitude, the pilot would need to heat the air again or release some weight from the balloon. Without intervention, the balloon would eventually land as the cooler air becomes less capable of supporting it.
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.
The balloon would get larger as the air pressure outside it dropped. At some height, the balloon would get large enough to burst.
It needs to be open at the bottom to get heat from the burners into the balloon to warm up the air and decrease its density. If you sealed it off, eventually heat exchange through the fabric of the balloon would could the air off enough that the balloon would no longer be bouyant and it would lose altitute.
There is a handle that you pull to close the vent that blows hot air into the balloon.
Three working forces on a hot air balloon are lift (created by hot air inside the balloon being lighter than the surrounding air), gravity (pulling the balloon downward), and drag (resistance caused by the air as the balloon moves through it).
If a hot air balloon, then stop heating the air. If a lighter-than-air balloon then release some of the gas.
with out the hot air the balloon would not rise
To weigh air in a balloon, you would first need to weigh the balloon when it is empty. Next, fill the balloon with air and weigh it again. The difference in the weights would give you an approximation of the weight of the air in the balloon. However, this method would not provide an accurate measurement of the weight of the air due to factors like the weight of the balloon material and the presence of air inside the balloon.
A hot air balloon does not depend on thrust like an airplane does. It rises due to the buoyancy of the hot air inside the envelope, which is lighter than the surrounding air. Drag does affect the balloon's movement and control, but it is not the primary force that allows it to float.
If the air inside a hot air balloon cooled down, the density of the air would increase, causing the balloon to lose its buoyancy. As a result, the balloon would begin to descend. To maintain altitude, the pilot would need to heat the air again or release some weight from the balloon. Without intervention, the balloon would eventually land as the cooler air becomes less capable of supporting it.
He would heat it.
When you inflate a balloon, even on land, you pinch the mouth of the balloon shut to stop air escaping once you have run out of air. You can do the same thing underwater. Take a breath, dive under, and blow into the balloon, and pinch it when you run out of air. You could also use a snorkel, but you will need to make sure you leave enough air in your lungs to blow water out of the snorkel.
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.
It's easy, just stop putting hot air in it.
Simple...hot air rises..