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← ScienceDuring 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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