Engineering Thermodynamics
The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.

Boyle's law
Joule's law
Charle's law
Gay-Lussac law

ANSWER DOWNLOAD EXAMIANS APP

Engineering Thermodynamics
The condition for the reversibility of a cycle is

The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
All of these
The working parts of the engine must be friction free
All the processes, taking place in the cycle of operation, must be extremely slow

ANSWER DOWNLOAD EXAMIANS APP