Question

In the liquid state, hydrogen is used as a fuel in ..............

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Answer 1

Answer:

Liquid hydrogen is used in large volumes in the space program as a primary rocket fuel for combustion with oxygen or fluorine, and as a pro- pellent for nuclear powered rockets and space vehicles. Although used more commonly in the gaseous state, hydrogen is stored and transported as a liquid.

Explanation:

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Answer 2

In the liquid state hydrogen is used as a fuel in a rocket.