Sea water, ρ = 64 lb_m/ft³, flows through the impeller of a centrifugal pump at the rate of 800 gal/min. Determine the torque exerted on the impeller by the fluid and the power required to drive the pump. Assume that the absolute velocity of the water entering the impeller is radial. The dimensions are as follows:

ω = 1180 rpm               t₂ = 0.6 in.

r₁ = 2 in.                        Î¸₂ = 135^o

r₂ = 8 in.                       t₁ = 0.8 in.