23.23 The following dissolved-oxygen values were found after 5 days of incubation in305-mL BOD bottles: 8.2, 8.0, and 8.1 in three blank samples and 7.4, 6.5, 4.9, 1.5,and 0.0 mg/L in bottles containing 0.5, 1, 2, 4, and 8 mL of sample, respectively.The 0-day dissolved oxygen of the sample was 6.5 mg/L. What is the 5-day BOD ofthe sample?

Answered: Image /qna-images/answer/0dd5861f-a061-4d69-8989-5b47f698ab90.jpg

The following dissolved-oxygen 305-mL BOD bottles: 8.2, 8.0, and 8.1 in three blank samples and 7 and 0.0 mg/L in bottles containing 0.5, 1, 2, 4, and 8 mL of sample, The 0-day dissolved oxygen of the sample was 6.5 mg/L. What is th the sample?

The following dissolved-oxygen 305-mL BOD bottles: 8.2, 8.0, and 8.1 in three blank samples and 7 and 0.0 mg/L in bottles containing 0.5, 1, 2, 4, and 8 mL of sample, The 0-day dissolved oxygen of the sample was 6.5 mg/L. What is th the sample?

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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Concept explainers

Fluid Materials

In general terms, anything that flows can be termed as a fluid. In other words, a fluid is any substance that cannot resist shear forces and deforms continuously under the application of external shear forces. Fluid materials differ completely from solid materials such as metals and alloys. For instance, if we consider two infinitesimally small cross-sectional areas of fluid materials and solid materials, and apply shear forces to these elements, both the elements will undergo deformation. Upon releasing the shear force, the element of the solid materials will regain its original orientation, but the element of the fluid materials will keep on deforming continuously under the action of the shear force.

Question

23.23 The following dissolved-oxygen values were found after 5 days of incubation in
305-mL BOD bottles: 8.2, 8.0, and 8.1 in three blank samples and 7.4, 6.5, 4.9, 1.5,
and 0.0 mg/L in bottles containing 0.5, 1, 2, 4, and 8 mL of sample, respectively.
The 0-day dissolved oxygen of the sample was 6.5 mg/L. What is the 5-day BOD of
the sample?

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