Engineering Thermodynamics
The behavior of a perfect gas, undergoing any change in the variables which control physical properties, is governed by

Boyle's law
Gay-Lussac law
All of the listed here
Charles' law

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Engineering Thermodynamics
Carnot cycle consists of

Two isothermal and two isentropic processes
One constant volume, one constant pressure and two isentropic processes
Two constant volume and two isentropic processes
Two constant pressure and two isentropic processes

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