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Is there nitrogen present in a hot air balloon?

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The lift force on a balloon is due to the expansion of gases from the heat of combustion of a hydrocarbon to lower the density of the mix within the canopy relative to the cool air surrounding the balloon. read more

HELIUM gas is present in the balloons because it is much lighter than air. it also depend on the type of ballon u r usig .if its a party ballon then carbo dioxide and nitrogen gas is filled in them.ifnf its a flying jet , satellite launching, parachute, or balloon of flyinf in the sky in all such cases HELIUM gas is used. read more

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