Water at 20◦c flows through a horizontal 1-mm-diameter tube to which are attached twopressure taps a distance 1m apart. (a) what is the maximum pressure drop allowed if theflow is to be laminar? (b) assume the manufacturing tolerance on the tube diameter isd=1.0±0.1mm. given this uncertainty in the tube diameter, what is the maximum pressuredrop allowed if laminar flow must be assured.

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.