A disk has 900 cylinders and the capacity of 300 MB. The number of revolutions per minute is 7200 and the seek time (t) as a function of the number of cylinders traveled (x) is t(x)-x [millisecond] (a) Compute the average access time for a contiguous file whose size is 100 MB. (b) Write a simulator that verifies the obtained analytic result. (b) Compute the average access time if this disk uses a cache memory that has the capacity of 1/2 50 MB and the access time of 1 ms

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