The piston of a hypodermic apparatus (Fig. 8-4) is being withdrawn at 0.30 in/s; air leaks in around the piston at the rate 0.0012 in'/s. What is the average speed of blood flow in the needle? I Choose as a control volume the region between the piston and the tip of the needle. M = pAu = PQ E (mass flow in unit time) =E (mass flow in unit time). (Prlooa(x)(0.02/12)/4](v) + (Prtooa)(0.0012/1728) = (Potoo(7)(0.2/12)²/4](0.30/12) v =2.18 ft/s in/s Piston d0.02 in D, -0.2 in Needle Fig. 84

The piston of a hypodermic apparatus (Fig. 8-4) is being withdrawn at 0.30 in/s; air leaks in around the piston at the rate 0.0012 in'/s. What is the average speed of blood flow in the needle? I Choose as a control volume the region between the piston and the tip of the needle. M = pAu = PQ E (mass flow in unit time) =E (mass flow in unit time). (Prlooa(x)(0.02/12)/4](v) + (Prtooa)(0.0012/1728) = (Potoo(7)(0.2/12)²/4](0.30/12) v =2.18 ft/s in/s Piston d0.02 in D, -0.2 in Needle Fig. 84

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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