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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Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

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