Arapid-mixing basin is to be designed for a water coagulation plant, and the design flow for the basin is 15,140m3/d. the basin is to be square with a depth equal to 1.25 times the width. the velocity gradient is to be 900 s-1 (at 10 °c), and the detention time is 30s. determine: a) the basin dimensions. b) the input power required. c) the impeller speed if a vane-disc impeller with six flat blades is employed and the tank is baffled. the impeller is to be 50% of the basin width.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false