A student needs to measure the air pressure inside a compressed air tank but does not have ready access to a pressure gage. Using materials already in the lab, she builds a U-tube manometer using two clear 3-ft-long plastic tubes, flexible hoses, and a tape measure. The only readily available liquids are water from a tap and a bottle of corn syrup. She selects the corn syrup because it has a larger density \((S G=1.4)\). What is the maximum air pressure, in psia, that can be measured?