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No,
A hot air "balloon" (the gondola basket, rigging, burners, envelope and crew) is heavier than air.
However when the envelope is filled with heated air this bubble of hot air is less dense than the air it displaces (outside the inflated envelope) and this hot air bubble exerts a buoyant lift that contracts the weight of the "balloon" and the ensemble rises into the air.
The hotter the air in the bubble the higher the "balloon" will rise until it matches the "balloons" density matches that of the air around it.
Thus on descent the pilot either allows the air in the bubble to cool or releases some of the hot air such that the overall density of the "balloon" ensemble is in equilibrium with air nearer the ground.
In this manner the pilot achieves a controlled, gentle descent. If the "balloon" ensamble had a high density compared the surrounding air (or the bubble/envelope were to leak) it would plummet to the ground an injure the passengers.
What else can I help you with?
What makes helium great to use in balloons and blimps?
Helium's density is less than the density of air, so it floats in air.
Can balloons float from the air out of your mouth?
Only in water. The air from your mouth is the same density as the air in the room- they will not float in air.
What happens to the density of air as it's temperature increases?
Becomes lighter and rises, the principle of hot air balloons.
How high do hot air balloons go up?
they contain helium molecules which are lighter than the air we breath making the balloons rise
Why can hot air balloons only go so high?
Hot air balloons can only go so high because the air becomes thinner and the temperature drops as altitude increases. This affects the buoyancy of the balloon since the difference in temperature between the air inside the balloon and the surrounding air decreases. Eventually, the balloon reaches a point where it cannot generate enough lift to continue ascending.
Is Density of helium balloon is greater or less than air?
The density of a helium balloon is less than that of the surrounding air. This is why helium balloons float in the air. Helium is lighter than the nitrogen and oxygen that make up the majority of Earth's atmosphere, so it provides buoyancy for the balloon.
What noble gas is used in party balloons and weather balloons because it is lighter than air?
Helium is the noble gas used in party balloons and weather balloons because it is lighter than air. Its low density makes it ideal for filling balloons as it provides buoyancy without adding much weight.
What element is used to fill airships and balloons?
Helium is typically used to fill airships and balloons due to its low density, which allows them to float in the air.
Why are hot air balloons able to rise into the air?
Hot air balloons rise because when the air inside the balloon is heated, it becomes less dense than the surrounding cooler air. This difference in density creates lift, causing the hot air balloon to float upward.
How do balloons float?
Balloons that are filled with hot air, hydrogen, or helium will float, or rise upward, because the less-dense gases inside them are displaced by the heavier air around them. Balloons will only rise until the gas density inside them is equal to the density outside. In the case of helium balloons, this may be above the elastic limit of the balloon, and it will pop or leak.
Which force allows hot air balloons to fly?
Hot air balloons fly due to the principle of buoyancy. As the air inside the balloon heats up, it becomes less dense than the surrounding cooler air. This difference in density creates a lifting force that allows the balloon to float in the air.
What property of the gas helium makes it useful in balloons?
Helium is lighter than air, which allows balloons filled with helium to float. Its low density also makes it safe for use in air-filled spaces.
