Q1:

A 77.7-kg person puts on a life jacket, jumps into the water, and oats. The jacket has a volume of 3.47 x 10'2 m3 and is completely submerged under the water. The volume ofthe person's body that is underwater is 6.34 x 10'2 m3. What is the density of the life jacket? Number n Units 1} A patient recovering from surgery is being given fluid intravenously. The fluid has a density of 1040 kg/m3, and 7.08 x 10-4 m3 of it flows into the patient every 8 hours. Find the mass flow rate in kg/s. Number i UnitsThe aorta carries blood away from the heart at a speed of about 36 cm/s and has a radius of approximately 1.1 cm. The aorta branches eventually into a large number of tiny capillaries that distribute the blood to the various body organs. In a capillary, the blood speed is approximately 0.064 cm/s, and the radius is about 5.6 x 10'4 cm. Treat the blood as an incompressible uid, and use these data to determine the approximate number of capillaries in the human body. Number I Units 1} The blood speed in a normal segment of a horizontal artery is 0.148 m/s. An abnormal segment of the artery is narrowed down by an arteriosclerosis plaque to 1/4 of its normal cross-sectional area. What is the difference in blood pressure between the normal and constricted segments of the artery? Number i UnitsIf a scuba diver descends too quickly into the sea, the internal pressure on each eardrum remains at atmospheric pressure while the external pressure increases due to the increased water depth. At sufficient depths, the difference between the external and internal pressures can rupture an eardrum. Eardrums can rupture when the pressure difference is as little as 35 kPa. What is the depth at which this pressure difference could occur? The density of seawater is 1025 kg/m3. Number i Units