google Bernoulli
constant=
v^2/2 + g z + p/rho
in your units
v in m/s
p in Pascals(N/m^2)
rho = 1000 kg/m^3 for water
g about 9.8
v at bottom = 1.2 m/s
v at top = 2 v at bottom =2.4 m/s
z at top = z at bottom + .2 meters
p/rho bottom =143000/1000
so
2.4^2/2 + 9.8(.2)+ 143 = 1.2^2+0+p/1000
Water flows through a garden hose that goes up a step 20.0 cm high. The cross sectional area of the hose on top of the step is half that at the bottom of the step. If the water pressure is 143 kPa at the bottom of the step, and the speed of the water at the bottom of the step is 1.20 m/s, what is the watter pressure at the top of the step?
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