The main water line enters a house on the first floor. the line has a gauge pressure of 2.78 x 10^5 pa. (a) a faucet on the second floor, 5.30 m above the first floor, is turned off. what is the gauge pressure at this faucet? (b) how high could a faucet be before no water would flow from it, even if the faucet were open?

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?