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← ScienceWhich risk increases when a rocket propellant's molecular nitrogen concentration rises?
A)Reduced combustion chamber temperature
B)Premature fuel-oxidizer separation
C)Elevated injector plate corrosion
D)Combustion instability due to diffusion✓
💡 Explanation
Combustion instability increases because Rayleigh's criterion predicts instability from higher pressure oscillations coinciding with heat release, driven by accelerated molecular diffusion of nitrogen. Decreased temperature is less likely; therefore, instability, rather than stable burning, will result due to nitrogen presence.
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