theBEAST
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Homework Statement
http://i.imgur.com/4kztfIs.png
The Attempt at a Solution
According to the solution, the max velocity is when the entropy of state 1 is equal to the entropy at state 2. Why is this the case?
My friend says it is because the system is isentropic but I am still very confused. Is the system actually isentropic first of all?