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  2. High-altitude balloon - Wikipedia

    en.wikipedia.org/wiki/High-altitude_balloon

    High-altitude balloons or stratostats are usually uncrewed balloons typically filled with helium or hydrogen and released into the stratosphere, generally attaining between 18 and 37 km (11 and 23 mi; 59,000 and 121,000 ft) above sea level. In 2013, a balloon named BS 13-08 reached a record altitude of 53.7 km (33.4 mi; 176,000 ft). [1]

  3. Gas balloon - Wikipedia

    en.wikipedia.org/wiki/Gas_balloon

    The first launch of a gas balloon by Jacques Charles and Les Frères Robert, 27 August 1783, at the Champ de Mars, Paris.Illustration from the late 19th century. A gas balloon is a balloon that rises and floats in the air because it is filled with a gas lighter than air (such as helium or hydrogen).

  4. Lifting gas - Wikipedia

    en.wikipedia.org/wiki/Lifting_gas

    In the past, coal gas, a mixture of hydrogen, carbon monoxide, and other gases, was also used in balloons. [ 5 ] [ better source needed ] It was widely available and cheap. Disadvantages include a higher density (reducing lift), its flammability [ 6 ] and the high toxicity [ 7 ] of the carbon monoxide content.

  5. 10 Best Hydrogen Fuel Cell Stocks To Buy Now - AOL

    www.aol.com/10-best-hydrogen-fuel-cell-200100112...

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  6. Balloon - Wikipedia

    en.wikipedia.org/wiki/Balloon

    A balloon is a flexible membrane bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, or air. For special purposes, balloons can be filled with smoke, liquid water , granular media (e.g. sand, flour or rice), or light sources.

  7. 3 Hydrogen Stocks to Buy for a Green and Clean Future - AOL

    www.aol.com/news/3-hydrogen-stocks-buy-green...

    Hydrogen stocks are a great ESG investment to make for a greener future. Air Products (NYSE:APD): Largest hydrogen gas supplier with industry-leading net earnings margins. Plug Power (NASDAQ:PLUG ...

  8. Tethered balloon - Wikipedia

    en.wikipedia.org/wiki/Tethered_balloon

    Early balloons were simple round spheres, with a payload hung beneath. The round shape uses the minimum material to accommodate a given volume of lifting gas, making it the lightest construction. However, in any significant wind the round shape is aerodynamically unstable and will bob about, risking damage or the balloon breaking free.

  9. Robert brothers - Wikipedia

    en.wikipedia.org/wiki/Robert_brothers

    The hydrogen gas was fed into the envelope through lead pipes; but as it was not passed through cold water, great difficulty was experienced in filling the balloon completely (the gas was hot when produced, but as it cooled in the balloon, it contracted). Daily progress bulletins were issued on the inflation; and the crowd was so great that on ...

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