Posted by **sarah** on Sunday, December 12, 2010 at 11:28am.

The volume flow rate in an artery supplying the brain is 3.10 10-6 m3/s.

(a) If the radius of the artery is 4.50 10-3 m, determine the average blood speed.

1 m/s

(b) Find the average blood speed at a constriction in the artery if the constriction reduces the radius by a factor of 4. Assume that the volume flow rate is the same as that in part (a).

- physics -
**drwls**, Sunday, December 12, 2010 at 11:47am
Velocity = Q/A, where Q is the volume flow rate.

If r is reduced by a factor of 4, area is reduced by a factor of 16, and velocity increases by that factor

## Answer this Question

## Related Questions

- Physics - An artery supplying heat muscle with blood is occluded to 13.9% of its...
- physics - Suppose an occlusion in an artery reduces its diameter by 22%, but the...
- physics - Suppose an occlusion in an artery reduces its diameter by 22%, but the...
- PHYSICS - An artery branches into two smaller veins, identical arteries as shown...
- Physics - An artery branches into two smaller veins, identical arteries as shown...
- Physics - An artery branches into two smaller veins, identical arteries as shown...
- Medical physics - 1.A hypodermic needle of lenght 0.020m and inner radius 3.0 ...
- Medical physics - 1.A hypodermic needle of lenght 0.020m and inner radius 3.0 ...
- math - If velocity v of blood flow at distance r from the center of an artery of...
- Calculus-Math - The speed S of blood that is r centimeters from the center of an...

More Related Questions