They have to let out the hot air a little at a time.
hot air balloons, colorful ones what kind of simple quesion is this!
Modern hot air balloons do not have sand bags because the air input is easily controlled for lift. Hot air balloons used to have sandbags to weigh them down until lift off and sand was gradually dumped to gain height in the air.
Helium is safer than hydrogen in hot air balloons because it is non-flammable. Hydrogen can ignite easily, posing a greater risk of fire. Additionally, helium is more stable and its lifting capacity is sufficient for use in hot air balloons.
Gases used are: air (and hot air), helium.
I am fairly sure that hot air balloons use normal air. They rely more on the idea of bouyancy rather than using specal gases, such as helium. The hot air inside of the balloon is more bouyant than the cold air outside of the balloon. So that makes the balloon ascend till the temperature of the air inside of the balloon is equal to the temperature of the air outside of the balloon. Then as the air inside the balloon gets colder, the balloon starts to descend.
Hot air balloons descend by either releasing hot air from the envelope or by using a vent at the top to let cool air in. Pilots can control the descent rate by adjusting the amount of hot or cool air in the envelope.
Hot air balloons go down by releasing the hot air in the balloon. Normally you just let the air inside cool and descend slowly. You release hot air only if you wish to descend more quickly.
There is a valve to release hot air from the top. The amount of hot air you let out from the top is replaced with cooler air from the bottom, causing the balloon to descend.
Hot air balloons can fly because hot air rises. When the air inside the balloon gets hot, it rises above the cooler air around it, and it lifts the balloon and any cargo and passengers with it.
Hot air balloons descend by gradually releasing hot air from the envelope. The pilot controls the descent by manipulating the amount of hot air in the envelope and finding a suitable landing spot. When the balloon reaches the desired altitude for landing, the pilot will release all the remaining hot air and bring the balloon gently back to the ground.
There are traditional hot air balloons, special-shaped hot air balloons (such as animals, objects, or characters), and solar-powered hot air balloons that use solar energy to heat the air inside.
Hot air balloons float because hot air displaces cool air in the atmosphere
air balloons or hot air balloons fly because they fill with a very light type of air. The air is hot air.
This may not help, but I didn't think it had ANYTHING to do with hot-air balloons...
People think that hot air balloons where made for battles.
when do hot air balloons cometo bucyrus ohio
hot air rises