Question

why is helium preferred to hydrogen in airships?
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Answer 1

Answer:

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Hydrogen is highly flammable all contemporary airships use helium. Helium is extensively used for filling balloons as it is a much safer gas than hydrogen. The hydrogen used to inflate dirigibles and observation balloons being highly inflammable and explosive, the balloons were easy to destroy with bullets.

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Answer 2

Answer: This may help you

Explanation:

The relationship shown in the diagrams shows that helium is safer than hydrogen to use for airships because the orbital diagram of helium shows that it has more control because it can pressurized to go up and down. Hydrogen, however, can only be used moving an airship up. The more control a pilot has, the safer it is for the passengers.