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During high-speed airflow compression in a jet engine intake, which outcome results when molecular vibration increases beyond a threshold?

A)Decreased combustion thermal efficiency
B)Increased fuel injection pressure
C)Improved compressor blade cooling
D)Enhanced exhaust nozzle thrust

💡 Explanation

Increased vibration stimulates molecular bond breaking vis a vis the Lindemann mechanism, reducing available chemical energy; therefore, combustion efficiency drops rather than increasing because energy is dissipated by molecular dissociation rather than directly driving thrust.

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