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If a balloon is filled with a substance that's less dense than air ... such as helium, hydrogen,
steam, or warmer air ... then the balloon is less dense than air.
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∙ 14y ago
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Why does Cold air normally go under warm air?
It's heavier. Warming gases makes them less dense. That is why hot air balloons work.
Why is air balloons filled with helium?
Because it is a safe gas that is less dense than air, thus balloons float in air
What is added to balloons and hot air balloons?
Balloons can be filled with air (don't float), or with hydrogen or helium (float because the gas is less dense). Hot air balloons use burners to heat the air so that it becomes slightly less dense than the cooler air around it, providing some lift.
How do hot air balloons work in the atmosphere?
Hot air always rises, because it is less dense.
Why do helium balloons float better than just air balloons?
helium is less dense than air. :) so helium will float better than air
Why do you use helium in balloons?
Helium is less dense than air, and therefore the balloon will float.
Are helium balloons more dense than air baloons?
No. At the same pressure, a helium filled balloon will be less dense than an air-filled balloon.
What makes air less dense?
polluntants
How is convection used in hot air balloons?
Hot air rises because it occupies a greater volume per unit mass of air than cooler air, this makes it less dense. A hot air balloons fire generates hot air which floats inside the balloon, causing it to rise.
Why do hellium-filled balloons rise in air?
Helium rises because it is less dense than air which causes it to rise. For example, styrofoam is less dense than water which is why it floats in water.
Why do helium-filled balloons raise in air?
Because helium is a less dense gas than a general air mixture
Why do helium and hot air balloon's rise?
Because helium is less dense than air, so it rises. Hot air balloons rise because heated air from the burner becomes less dense and therefore rises.
