A centrifugal water pump rotates at 750 RPM. The impeller inlet radius is 0.04 m, the exit radius is 0.10 m, and it has straight vanes. The water enters the inlet at an average velocity of 2.5 m/s...

A centrifugal water pump rotates at 750 RPM. The impeller inlet radius is 0.04 m, the exit radius is 0.10 m, and it has straight vanes. The water enters the inlet at an average velocity of 2.5 m/s (without swirl). Calculate pressure rise and the power required for operating the pump (η = 0.95). Also estimate the angle β₁
at the inlet tip.