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Which risk increases when cryogenic liquid hydrogen undergoes rapid phase transition?

A)Increased system embrittlement propagation
B)Decreased nozzle combustion instability
C)Enhanced volumetric thermal capacity
D)Augmented propellant energy density

💡 Explanation

Boiling liquid hydrogen causes cold temperatures; because the Joule-Thomson effect results in localized cryogenic embrittlement due to increased energy consumption, thermal stress propagation poses risks. Therefore failure occurs, rather than better thermal volumetric capacity, which would offer stable conditions.

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