Suppose a disk drive has the following characteristics: • 8 surfaces • 843 tracks per surface • 256 sectors per track • 256 bytes/sector • Tract-to-track seek time of 8.3 milliseconds • Rotational speed of 7,200 RPM. a) What is the capacity of the drive? b) What is the access time?

An ammonia compressor has a 5% clearance volume and displacement rate of 80 l/s and pumps against a condensing temperature of 40°c. for two different temperatures of -10°c and 10°c, compute the mass flow rate of refrigerant assuming the clearance volumetric efficiency applies. discharge specific volume corresponding to-10°c and 10°c are 112.5 l/kg and 95 l/kg, respectively.