Compressors, Gas Turbines and Jet Engines
In the aircraft propellers

Propulsive matter is ejected from within the propelled body
Its functioning does not depend on presence of air
The propulsive matter is caused to flow around the propelled body
All of these

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Compressors, Gas Turbines and Jet Engines
Intercooling in gas turbines

Decreases net output but increases thermal efficiency
Decreases net output and thermal efficiency both
Increases net output but decreases thermal efficiency
Increases net output and thermal efficiency both

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