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← ScienceWhich consequence results when the specific gas constant's value decreases significantly in a rocket's nozzle?
A)Increased nozzle exhaust velocity
B)Decreased thrust efficiency occurs✓
C)Lower combustion chamber pressure
D)Higher heat transfer to nozzle walls
💡 Explanation
Decreased gas constant negatively affects thrust because the *ideal gas law* dictates that lower R results in a lower exit velocity for a given pressure in the nozzle; therefore, thrust efficiency suffers, rather than increasing exhaust velocity or decreasing chamber pressure under stable combustion.
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