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

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?