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Water is flowing through a tube. The water speed is 6.30 m/s at point 1. Point...

Water is flowing through a tube. The water speed is 6.30 m/s at point 1. Point 2 is 7.1 m higher than point 1. The diameter of the pipe is 0.40 m at point 1 and 0.20 m at point 2. What is the pressure difference P1-P2 between points 1 and 2? (ρ(H2O)=1000 kg/m3)

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