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(3) We are offered some pipes made of a new kind of plastic. To test their roughness, we pump water through a 0.0762 m pipe made of this material at an average velocity of 12.19 m/s. The observed Fanning friction factor is 0.0032. Estimate the absolute roughness of this plastic.

(3) We are offered some pipes made of a new kind of plastic. To test their roughness, we pump water through a 0.0762 m pipe made of this material at an average velocity of 12.19 m/s. The observed Fanning friction factor is 0.0032. Estimate the absolute roughness of this plastic.

Elements Of Electromagnetics
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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(3) We are offered some pipes made of a new kind of plastic. To test their roughness, we pump water through a 0.0762 m pipe made of this material at an average velocity of 12.19 m/s. The observed Fanning friction factor is 0.0032. Estimate the absolute roughness of this plastic. (4) What pressure drop is required in order to pump water at 20°C through a pipe 25 cm in diameter and length 1234 m at a rate of 1.97 m² sec1? The pipe is horizontal and contains four standard-radius 90° elbows and two 45° elbows. (A standard-radius 90° elbow is roughly equivalent to the resistance offered by a pipe of length 32 diameters; a 45° elbow, 15 diameters)
Transcribed Image Text:(3) We are offered some pipes made of a new kind of plastic. To test their roughness, we pump water through a 0.0762 m pipe made of this material at an average velocity of 12.19 m/s. The observed Fanning friction factor is 0.0032. Estimate the absolute roughness of this plastic. (4) What pressure drop is required in order to pump water at 20°C through a pipe 25 cm in diameter and length 1234 m at a rate of 1.97 m² sec1? The pipe is horizontal and contains four standard-radius 90° elbows and two 45° elbows. (A standard-radius 90° elbow is roughly equivalent to the resistance offered by a pipe of length 32 diameters; a 45° elbow, 15 diameters)
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