Q1:

A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.40 x 105 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 4.00 x 10-4 m, obtain the magnitude of the force that the screw thread exerts on the cap in order to keep it on the bottle. The air pressure outside the bottle is one atmosphere. Number i UnitsThe drawing shows an intravenous feeding. With the distance shown, nutrient solution (p = 1040 kg/m3) can just barely enter the blood in the vein. What is the gauge pressure ofthe venous blood? Express your answer in millimeters of mercury. Almospheri :2 pressure \\i :55 " r , , 0.610m a \\l J The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is 1/21 of an atmosphere. If a diver uses a snorkel for breathing, how far below the water can she swim? Assume the diver is in salt water whose density is 1022 kg/m3. Number i 0.462 Units m At a given instant, the blood pressure in the heart is 1.1 x 104 Pa. If an artery in the brain is 0.49 rn above the heart, what is the pressure in the artery? Ignore any pressure changes clue to blood ow. Number l Units 4} In the process of changing a flat tire, a motorist uses a hydraulic jack. She begins by applying a force of 46 N to the input piston, which has a radius r1. As a result, the output plunger, which has a radius r2, applies a force to the car. The ratio r2/r1 has a value of 9.3. Ignore the height difference between the input piston and output plunger and determine the force that the output plunger applies to the car. Number Units