the water depth in lake powell just behind the glen canyon dam is about 550 feet. this is the same depth as the water in a 1-inch diameter water pipe that goes from the 45th floor of the empire state building to the sidewalk level. supposing that this water pipe is open to the air at the 45th floor and full of stationary water so that its water height above the sidewalk on 34th street is also 550 feet, how does the pressure 550 feet deep behind the glen canyon dam compare to the pressure in the pipe at the level of 34th street? you may assume in this case that atmospheric pressure at lake powell and in new york city happen to be the same when the measurements are made.