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physics

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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 - ,

    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

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