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  2. Rocketdyne J-2 - Wikipedia

    en.wikipedia.org/wiki/Rocketdyne_J-2

    The spherical helium tank was positioned inside the hydrogen tank to minimize engine complexity. It held 16,000 cm 3 (1,000 cu in) of helium. The larger spherical hydrogen gas tank had a capacity of 118,931 cm 3 (7,257.6 cu in). Both tanks were filled from a ground source prior to launch and the gaseous hydrogen tank was refilled during engine ...

  3. Suicide bag - Wikipedia

    en.wikipedia.org/wiki/Suicide_bag

    In 2015 author and right-to-die advocate Derek Humphry reported that Worthington Industries, the world's largest manufacturer of disposable helium cylinders, had announced that their helium cylinders will guarantee only 80% helium, with up to 20% air, making them inappropriate for use with a suicide bag in Humphry's opinion. [23]

  4. Worthington Enterprises - Wikipedia

    en.wikipedia.org/wiki/Worthington_Enterprises

    Worthington Enterprises, Inc. is a global diversified metals manufacturing company based in Columbus, Ohio.It is a steel processor and manufacturer of pressure vessels, such as propane, oxygen and helium tanks, hand torches, refrigerant and industrial cylinders, camping cylinders, exploration, recovery and production products for global energy markets; water system tanks for storage, treatment ...

  5. Lifting gas - Wikipedia

    en.wikipedia.org/wiki/Lifting_gas

    Hydrogen and helium are the most commonly used lift gases. Although helium is twice as heavy as (diatomic) hydrogen, they are both significantly lighter than air. The lifting power in air of hydrogen and helium can be calculated using the theory of buoyancy as follows: Thus helium is almost twice as dense as hydrogen.

  6. Cryogenic storage dewar - Wikipedia

    en.wikipedia.org/wiki/Cryogenic_storage_dewar

    A self-pressurising dewar (silver) being filled with liquid nitrogen from a larger storage tank (white). A cryogenic storage dewar (or simply dewar) is a specialised type of vacuum flask used for storing cryogens (such as liquid nitrogen or liquid helium), whose boiling points are much lower than room temperature.

  7. Dying To Be Free - The Huffington Post

    projects.huffingtonpost.com/dying-to-be-free...

    The last image we have of Patrick Cagey is of his first moments as a free man. He has just walked out of a 30-day drug treatment center in Georgetown, Kentucky, dressed in gym clothes and carrying a Nike duffel bag.

  8. Is iSpace getting into the rare helium mining business? - AOL

    www.aol.com/opinion-ispace-getting-rare-helium...

    Helium 3 is rare on Earth, primarily produced by the radioactive decay of tritium, but it does reside in abundance in the lunar regolith, deposited by billions of years of solar wind. The isotope ...

  9. Gas blending for scuba diving - Wikipedia

    en.wikipedia.org/wiki/Gas_blending_for_scuba_diving

    The amount of helium that must be decanted is very simple to calculate: Multiply the desired gas fraction of helium (F He) by the total filling pressure (P tot) to get partial pressure of helium (P He). In the case of the Tx 20/40, in a 230 bar cylinder, this would be 230 bar x 40% = 92 bar (or for a 3,000 psi fill, it would require 3,000 x 40% ...

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