Water flows at speed of 5.6 m/s through a horizontal pipe of diameter 3 cm. The gauge
pressure P1 of the water in the pipe is 1.7 atm.
A short segment of the pipe is constricted to
a smaller diameter of 2.1 cm
1.7 atm
212
5.6 m/s
3 cm
2.1 cm
What is the gauge pressure of the water
flowing through the constricted segment? At-
mospheric pressure is 1.013 10 Pa The
density of water is 1000 kg/m
The viscosity
of water is negligible.
Answer in units of atm.

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