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Which outcome occurs when the hypersonic engine's nozzle ablates?

A)Reduced thrust and wasted fuel
B)Increased vehicle aerodynamic efficiency
C)Flameout due to richer mixture
D)Lower engine thermal management needs

💡 Explanation

Ablation widens the nozzle, reducing pressure and thrust, due to the mechanism of **isentropic expansion**. This also means that more fuel will be wasted because less work is extracted given a fixed volume of fuel injected; therefore, thrust reduces rather than increases efficiency.

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