For those who love ๐ŸŽˆ...

  • ๐Ÿ“1) How big are your balloons?

    Let's assume all your balloons are spherical and have the same size. Choose the radius (in centimetres): , and calculate the volume of a sphere (Volume = 4/3*ฯ€*rยณ) cm3, which corresponds tolitres.


  • ๐ŸŽˆ2) You need to know that each litre of helium gas can lift about one gram.

    You could use hydrogen, ammonia or methane. They are also lighter than air, but they are easily flammable๐Ÿ”ฅ๐Ÿš’๐Ÿงฏ๐Ÿ˜ข... so better stick with helium.


  • โš–๏ธ3) How much do you weigh?

    Write your weight in kilos (remember to include your clothes๐Ÿ‘˜, shoes๐Ÿ‘Ÿ and everything you want to carry with you ๐Ÿ‘‘๐Ÿถ๐ŸŽ’๐Ÿ๐Ÿฅ): kilos. It corresponds to grams.


  • ๐Ÿ†—4) Now you are ready to discover how many balloons you need to float in the air!

    Divide your weight in grams by the volume of your balloon in litres.
    You need approximately     balloonsโ—

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