Consider a queueing system in which the mean arrival rate is 800 veh/h and mean service rate is 1200 veh/h. Draw a graph showing the effect of intensity on queue length characteristics [namely L, Lq, E(m/m>0), and Var(n)] (i) When the queue system is an M/M/1, (ii) when the queue system is an M/D/1
Comment on the graphs and how they relate

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?