Assuming the river is well-mixed immediately at the point of discharge of the sewerage stream, what is the DO in mg/L immediately downstream of the discharge?
The Ganges River, shown in Figure 4.66, has an annual average flow rate of 12,105 m3/s. The average temperature of the Ganges River was reported to be 24.6ºC. The Ganges has become contaminated with raw sewerage and industrial waste so that the dissolved oxygen in the river upstream of sewerage discharges is 4.6 mg/L. Suppose that the raw sewerage that is untreated flows into the Ganges at a rate of 460 m3/s, the temperature is 25ºC, and the dissolved oxygen in the sewerage stream is completely depleted (i.e. DO = 0). How would you develop a plan for improving water quality in the Ganges River?
What will be an ideal response?
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Answer the following statements true (T) or false (F)
1) OSHA currently has an approved and implemented Ergonomic Standard that applies to all organizations that fall under OSHA's jurisdiction. 2) MSDs and CTDs are not as high on the list of the top ten causes of workers' compensation payments as the general public thinks. 3) Employers can change worker behavior without changing their organization's culture. 4) Human factors are human characteristics as well as environmental, organizational, and job factors that influence the behavior of workers in ways that can affect workplace safety and health.
Which of the following is a true statement about the Peng-Robinson parameters a andb?
A. The b variable is ultimately a function of universal physical constants and so has the same value for all compounds. B. The a variable can have units of L•J/kmol•mol C. The a variable is calculated by 27/64 (R^2 T_c^2)/P^2 D. The b variable has dimensions of amount of substance per length to the third power. E. None of these statements are true.
Dog food can also be fed to cats with no ill effects
Indicate whether the statement is true or false
What is the first color of light that can be seen when a piece of metal is being heated?
What will be an ideal response?