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1) a water flow with a pipe has rides ( 1 cm ) by initial velocity...

1) a water flow with a pipe has rides ( 1 cm ) by initial velocity ( 0.7 m/s ) to fill a tank with ( 20 Liter ), calculate the needed time to fill this 20 liter tank .

2) a water flow inside a pipe with velocity ( 4.2 m/s ) and the pressure on pipe entrance is 84 kPa , if the pipe rise up to ( ( 4m ) So that the velocity became ( 2.8 m/s ), calculate the pressure at the exit .

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