# How many balloons?

Question asked by: ajdayho

Asked on: 08 Dec 2009

To work this out you need to know the volume of each of your helium balloons, and then know how light a volume of helium is compared to the same amount of air.

Then when you know the mass of the person and those two amounts you can calculate the mass that can be lifted by a given volume of helium, which is the relevant factor here.

By: knowitall

Replied at: 13 Dec 2009

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