engineering recuitment UKPSC Polytechnic Lecturer Mock Test 2024 Thermodynamics Second Law of Thermodynamics and Entropy
Which one of the following is possible according to the second law of thermodynamics?
1
100% conversion of a quantity of heat into work
2
Spontaneous flow of heat from a cold to a hot body
3
Spontaneous compression of a gas without external work
4
A perpetual frictionless pendulum