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## Homework Statement

The pump in the system below has an efficiency of 75%. The atmospheric pressure is 101 kPa and the vapor pressure is 2.3 kPa (in absolute units). Assume kinematic viscosity is 0.96x10-6 m2/s. Neglect minor losses.

a) Calculate the velocity through the main pipe and of the jet

and a few other questions to do with friction factor, etc.

## Homework Equations

AV=AV

v^2/2g + P/pg = v^2/2g + P/pg

Have been given the answers but no working. – 9.66 m/s for pipe and 38.64 m/s for jet

## The Attempt at a Solution

First used AV=AV to get

v_2 = [(d_1)^2/(d_2)^2] v_1

Then I put this into Bernoulli with the relevant pressures P_1 = 700000, P_2 = 101000 but I only manage to get v_1 = 8.94 m/s.

I have tried working it with elevation head but still can't seem to get the right answer. I am thinking maybe I should have pump head? But not too sure how to calculate with what I have been given.