The volume flow rate in an artery supplying the brain is 3.6 x 10-6 m3/s. a) If the radius of the artery is 5.2 mm, determine the average blood flow speed. b) Find the average blood speed at a constriction in the artery if the constriction reduces the radius to one – third of the original. Assume that the volume flow rate is the same as that in part (a).

Estimate the average blood pressure in a person's foot if the foot is 1.35 m below the aorta, where the average blood pressure is 104 mmHg. For the purposes of this estimate, assume the blood isn't flowing. The density of blood is 1060 kg/m³. ]mmHg

A hypodermic needle of length 3 cm and internal diameter of 0.45 mm is used to draw blood with viscosity of 4 mPl. Assuming the pressure difference across the needle is 80 cmHg, how long does it take to draw 15 mL?

The following is a practice question for an upcoming test: At a resting pulse rate of 77 beats per minute, the human heart typically pumps about 73 mL of blood per beat. Blood has a density of 1060 kg/m3. Circulating all of the blood in the body through the heart takes about 1 min for a person at rest. On average, what mass of blood does the heart pump with each heart beat in kg? mass per heart beat:

The density of platinum is 21500 kg/m3 and that of aluminum is 2702 kg/m3. Find the ratio of the volume of 1.20 kg of platinum to the volume of 1.01 kg of aluminum.

a.) When placed in a pycnometer, 20 g of salt displaces 7.6 g of kerosene. If the mass density of kerosene is 0.83 g/cm3, find the volume and density of the salt.   b.) When equal masses of two substances are mixed, the resultant density is 2.5 g/cm3.  When equal volumes are mixed, the resultant density is 4.5 g/cm3. What are the densities of the two substances?   c.) Water from a spring is carried through a pipe of length 100 m down a hill inclined at 200 to the horizontal. When the pipe is full but water is not flowing, what is the pressure at the lower end of the pipe?   d.) Three children each having a mass of 37.4 kg make a log raft by lashing together logs of diameter 32 cm and length 1.77 m. How many logs will be needed to keep them afloat? Take the density of the wood to be 0.75 X 103 kg/m.

About 32% of the body of a person floating in the Dead Sea will be above the water line. Assuming that the human body density is 0.990 g/cm3, find the density of the water in the Dead Sea. Number i Units

The human ciculatory system has approximately 109 capillary vessels. Each vessel has a diameter of about 8.4 μm. Assuming cardiac output is 4.2 L/min, determine the average velocity (m/s) of blood flow through each capillary vessel.

The blood flow rate through the aorta is measured to be 107.3 cm^3/s, and an adult is measured to have 5.02 L of blood. How long does it take for all of your blood to pass through the aorta?   If the adult's aorta has a diamter of 2.05 cm, what is the speed of blood as it flows through the aorta?

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