41. An analytic function of a complex variable z=x+iy(i=. -I) is defined as f(z) = x-y+iu(x,y), where (x,y) is a real function. The value of the imaginary part of f(z) at z=(1+i) is round off to 2 decimal places). 42. A slot of 25 mm 25 mm is to be milled in a workpiece of 300 mm length using a side and face milling cutter of diameter 100mm, width 25 mm and having 20 teeth. For a depth of cut 5 mm, feed per tooth 0.1 mm, cutting speed 35 m/min and approach and over travel distance of 5 mm each, the time required for milling the slot is decimal place). minutes (round off to one 43. Air discharges steadily through a horizontal nozzle and impinges on a stationary vertical plate as shown in figure. atm Pinlet = 0.36 kPa M The inlet and outlet area of the nozzle are 0.1 m and 0.02 m, respectively. Take air density as constant and equal to 1.2 kg/m. If the inlet gauge pressure of air is 0.36 kPa, the gauge pressure at point O on the plate is kPa (round off to two decimal places).