“A dream. It’s perfect”: Helium discovery in northern Minnesota may be biggest ever in North America::For a century, the U.S. Government-owned the largest helium reserve in the country, but the biggest exporters now are in Russia, Qatar and Tanzania. With this new discovery, Minnesota could be joining that list.

  • skillissuer@discuss.tchncs.de
    link
    fedilink
    English
    arrow-up
    3
    ·
    8 months ago

    how much do you need to float, if it’s helium then 1L lifts about 1g of mass, if it’s 50% helium 50% air it lifts 0.5g per liter, then it depends on how heavy balloon is in relation to its volume

    • kalkulat@lemmy.world
      link
      fedilink
      English
      arrow-up
      1
      ·
      edit-2
      8 months ago

      The balloon + helium has to be lighter than the (couple of liters of) air it displaces.

      He Density (at STP) 0.1786 g/L

      The density of air at sea level is about 1.2 g/L

      Another interesting factoid about rare elements: Very little nickel is found in the Earth’s crust. Most nickel has arrived on Earth from meteors. Usually mixed with iron, which held-back the arrival of the iron-age.