(Forall (?Self ?Time)
(=> (Active ?Time Steady-Flow-In-Nozzle ?Self)
(And (= (Lambda (?T)
(If (= ?T ?Time)
(Value-At (Work-Rate ?Self) ?T)))
0)
(Forall (?Cv)
(=> (Process-Cv ?Self ?Cv)
(= (Lambda (?T)
(If (= ?T ?Time)
(Value-At (Pe-Rate-Out ?Cv)
?T)))
(Lambda (?T)
(If (= ?T ?Time)
(Value-At (Pe-Rate-In ?Cv)
?T)))))))))
(Forall (?Self ?Time)
(<=> (Active ?Time Steady-Flow-In-Nozzle ?Self)
(And (Steady-Flow-In-Nozzle ?Self)
(Active ?Time Steady-Flow-Expansion ?Self)
(Active ?Time Steady-Flow-Adiabatic-Process ?Self))))