Answered: Water level

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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Question

A device for measuring liquid viscosity is shown in Fig.
P3.177. With the parameters ( ρ , L, H, d ) known, the fl ow
rate Q is measured and the viscosity calculated, assuming a
laminar-fl ow pipe loss from Chap. 6, h _f = (32 μ LV )/( ρ gd ² ).
Heat transfer and all other losses are negligible. ( a ) Derive
a formula for the viscosity μ of the fl uid. ( b ) Calculate μ for
the case d = 2 mm, ρ = 800 kg/m ³ , L = 95 cm, H = 30 cm, and Q = 760 cm ³ /h. ( c ) What is your guess of the fluid in
part ( b )? ( d ) Verify that the Reynolds number Re_d is less
than 2000 (laminar pipe flow).

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