Calculate the flow rate of blood (with density of 1.15 g/cm^3) in an aorta with a cross-sectional area of 2.54 cm^2 if the flow speed is 48.9 cm/s. Ans. in units of g/s.
Also, assume the aorta brances to form a large # of capillaries w/ a combined cross-sectional area of 2720 cm^2. What is the flow speed in the capillaries in cm/s?
2006-11-30 12:17:03 · 1 answers · asked by Dee 4 in Science & Mathematics ➔ Physics
If the cross-secional area of the aorta is 2.54 cm^2, and the blood flows at 48.9 cm/s, then in each second, 2.54*48.9 CUBIC centimeters of blood is flowing through the aorta. All you have to do is multply.
For the second part, you use the answer from the first part.
48.9*2.54 cubic centimeters per second is flowing through a bunch of capillaries with a combined cross-sectional area of 2720 cm^2. Therefore the speed must be 48.9*2.43/2720 cm/second. It's always a good idea to check units: 48.9*2.43 cm^2/sec/2720 cm^2 comes out in units of cm/second.
Same concept as "wide rivers run slowly"
2006-11-30 12:38:19 · answer #1 · answered by firefly 6 · 0⤊ 0⤋