(a) a 30-station transfer line has an ideal cycle time of 0.75 min. an average downtime of 6.0 min per line stop occurrence,
and a station failure frequency of 0.01 for all stations. a proposal has been submitted to locate a storage buffer between
stations 15 and 16 to improve line efficiency. determine (a) the current line efficiency and production rate, and (b) the
maximum possible line efficiency and production rate that would result from installing the storage buffer.

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2