1. A stream of water at 5 MPa and 80 C (stream 1) is mixed with another stream of water at 5 MPa and 700 C (steam 2) to produce saturated liquid water at the same pressure. A steady state mixing tank is used with a stirrer having a motor torque of 2 kJ/rotation and a rotation speed of 700 rpm. Find the mass flow rate ratio of stream 2 to that of stream 1. (Ans. 0.244 )