A student goes to the laboratory supply room and obtains six feet of clear plastic tubing with an outer diameter of 12 mm and a wall thickness of 1/16 inch. She bends the tube into a U shape with the open ends pointing up and uses a funnel to pour 70 mL of water into the tube. By blowing air into one end of the tube, she generates a 9.00-cm difference in the water levels on each side. Pressure Exerted Check unit conversions and significant figures. What was the pressure (psi) she exerted with her lungs on the water in the tube? Consider all assumptions explicitly. !psi psi i Alternate Fluid If the fluid had been acetic acid instead of water and the student had exerted the same pressure, what would the difference in the liquid levels have been? i cm Hint