A straight duct extends in the z direction for a length L and has a square cross section, bordered by the lines x=B and y=B. A colleague has told you that the velocity distribution is given by vz=4L(P0PL)B2[1(Bx)2][1(By)2] Since this colleague has occasionally given you wrong advice in the past, you feel obliged to check the result. Does it satisfy the relevant boundary conditions and the relevant differential equation? Five hundred kilograms per hour of steam drives a turbine. The steam enters the turbine at 44atm and 450C at a linear velocity of 60m/s and leaves at a point 5m below the turbine inlet at atmospheric pressure and a velocity of 360m/s. The turbine delivers shaft work at a rate of 70kW, and the heat loss from the turbine is estimated to be 104kcal/h. Calculate the specific enthalpy change associated with the process