A person is donating blood. The pint bag in which the blood is collected is initially flat and is at atmospheric pressure. Neglect the initialmass of air in the 1/8-in. I.D., 4-ft-long plastic tube carrying blood to the bag. The average blood pressure in the vein is 40 mm Hg aboveatmospheric pressure. Estimate the time required for the person to donate one pint of blood. Assume that blood has a specific gravityof 1.06 and a viscosity of 1.0 × 10-4 lb-s/ft². The needle's I.D. is 1/16 in. and the needle length is 2.0 in. The bag is 1.7 ft below the needleinlet and the vein's I.D. is 1/8 in.t =9.35min

The diameter of the pipe = (1/8) inThe length of the pipe = 4 ft.Average blood pressure in the vain=…

Answered: . Estimate the time required for the…

Engineering

Civil Engineering

. Estimate the time required for the person to donate one pint of blood. A

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

A person is donating blood. The pint bag in which the blood is collected is initially flat and is at atmospheric pressure. Neglect the initial
mass of air in the 1/8-in. I.D., 4-ft-long plastic tube carrying blood to the bag. The average blood pressure in the vein is 40 mm Hg above
atmospheric pressure. Estimate the time required for the person to donate one pint of blood. Assume that blood has a specific gravity
of 1.06 and a viscosity of 1.0 × 10-4 lb-s/ft². The needle's I.D. is 1/16 in. and the needle length is 2.0 in. The bag is 1.7 ft below the needle
inlet and the vein's I.D. is 1/8 in.
t =
9.35
min

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