(Solved): 2. Air flows through a horizontal nozzle (Figure 1) with an inlet velocity of \( 200 \mathrm{~m} / ...

2. Air flows through a horizontal nozzle (Figure 1) with an inlet velocity of \( 200 \mathrm{~m} / \mathrm{s} \) and a temperature of \( 250^{\circ} \mathrm{C} \). It exits at a temperature of \( 300^{\circ} \mathrm{C} \). Assuming that the nozzle is adiabatic and air behaves as an ideal gas,: a) Calculate the exit velocity (20 marks) b) Explain what happens to the exit velocity if the exit cross sectional area is reduced and explain why it happens. (5 marks) Take \( \mathrm{C}_{\mathrm{p}}=1.005 \mathrm{~kJ} / \mathrm{kg} . \mathrm{K} \).