<p>The main water lines enters a house on the first floor. The line has a gauge pressure of 1.0 x 10^5 Pa. (a) A faucet on the second floor, 6.5m 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?</p>
<p>Please explain, thanks!</p>