• Question: How is helium lighter than air?

    Asked by alan14211421 to Alessandro, Angela, Claudia, Marina, Phil on 18 Mar 2013.
    • Photo: Claudia Krehl

      Claudia Krehl answered on 18 Mar 2013:

      Helium is lighter than air, as the it has a much lower density. That is the reason why it was used in airships such as the Hindenburg to make these large structures boyant in air. Unfortunately it is also highly flammable.

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