Searches related to 42 mhz of bandwidth is allocated for cellular system deployment. A system uses 100 khz simplex channels and operates if c-sir is 10 db and above. In the area where the wireless system is going to be deployed user makes 3 phone calls per hour and each call lasts 5 minutes on average the goverment imposes on service providers to keep their call blocking probability

Air enters a horizontal, constant-diameter heating duct operating at steady state at 290 k, 1 bar, with a volumetric flow rate of 0.25 m°/s, and exits at 325 k, 0.95 bar. the flow area is 0.04 m2. assuming the ideal gas model with k = 1.4 for the air, determine (a) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer, in kw flow rate, in kg/s, (b) the mass kg 0.3