Oxygen flows into an insulated device with initial conditions as follows: \(p_{1}=30\) psia, \(T_{1}=750^{\circ} \mathrm{R}\), and \(V_{1}=639 \mathrm{ft} / \mathrm{sec}\). The area changes from \(A_{1}=6 \mathrm{ft}^{2}\) to \(A_{2}=5 \mathrm{ft}^{2}\).

(a) Compute \(M_{1}, p_{t 1}\), and \(T_{t 1}\).

(b) Is this device a nozzle or diffuser?

(c) Determine \(M_{2}, p_{2}\), and \(T_{2}\) if there are no losses.