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Newtons from Bouyancy underwater comparing helium, oxygen, and hydrogen

  1. Apr 1, 2010 #1
    I have an under water application where I need the maximum amount
    of buoyancy with a limit to the volume i can use for a lifting device.
    My question is how much more newtons would be exerted for helium instead of oxygen, or hydrogen instead of oxygen underwater?
    What is the percentage increase ?

    Thanks in advance
  2. jcsd
  3. Apr 1, 2010 #2


    User Avatar

    Staff: Mentor

    Welcome to PF. On this site, we try to help people learn to learn, rather than just spoon feeding answers. What have you tried so far in figuring this out? Hint: what are the densities of those gases (relative and under pressure)? What is the density of water?
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