Hydrogen (explosive), Helium (non-explosive).
Helium
A capstan is a spool around which ropes are wound while lifting weights.
The * selector is used to match any element in the hierarchy.
The BS equivalent of ASME B30.9, which pertains to slings used for lifting, is BS 7121. This British Standard outlines the requirements for the safe use of lifting equipment and accessories, including slings, ensuring proper design, manufacture, testing, and maintenance for safe lifting operations.
LEAD
Helium
Hydrogen was once used to fill airships. Quite dangerous due to how flammable it is.
Hydrogen and helium are two elements that are kinda-sorta interchangeable in airships.
The only answer that comes to mind is "Airships". Hydrogen, the lightest element, was used in airships, where excess weight was undesirable. However, accidents like the Hindenburg disaster showed that Hydrogen gas was too dangerous(it is extremely flammable) to be used. Since then, Helium has been used instead. Helium is also a very light element, and is completely safe, as it is inert.
Helium is typically used to fill airships and balloons due to its low density, which allows them to float in the air.
Hydrogen was the gas that was once used to filled airships. It is extremely plentiful and easy to produce. However, it is also extremely flammable and caused a few accidents. Helium is now used.
An example of a gas element is helium, which is a noble gas commonly used in party balloons and airships.
Hydrogen used to be used in airships.
gas is still used in airships to provide lift.
Hydrogen was one of the earliest gases to be used for inflatable flying balloons, but following the Hindenberg disaster helium is now used, as it is chemically inert.
Generally , they have to be light and strong materials . In airships , aluminum is used because it's light, strong and resistant to corrosion. In air balloons , i think strong rubber made of a material with a high melting point so that it doesn't melt at high temperatures inside the balloon is used, as well as fabric ouside.
Tungsten