Compression and expansion in real life cases will always follow the polytropic process that is described by the formula(s):

Compression and expansion in real life cases will always follow the polytropic process that is described by the formula(s):

Compression and expansion in real life cases will always follow the polytropic process that is described by the formula(s): 

1. P1V1 = P2V2
2. P1V1n = P2V2n
3. PVn = Constant
4. PV = Constant


A. 1, 2

B. 2, 3

C. 3, 4

D. 1, 3

E. 2, 4


Answer: B


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