Reference no: EM13856817

Question 1

Write an essay consisting of at least 500 words addressing ALL of the following topics (a. through e.):

Describe the Anthem Community Park in Maricopa, Arizona? Why do you think the authors included it in the textbook?

Regarding heavy metals:

Explain how heavy metals are an environmental health problem.

How does a heavy metal get into the food chain?

List two heavy metals and describe why they are health concerns.

What are the pros and cons of DDT and PCBs? Why, at one time, were DDT and PCBs extremely useful chemicals, but now they are prohibited? Explain how Rachel Carson's book, Silent Spring, had an influence on DDT regulations.

If a soil consists of 65% sand, 25% silt, and 10% clay, what is its soil classification using the triangular soil classification chart?

Describe the type of soil and bedrock in the city or military base where you reside (or the nearest city to your home or base).

You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be

referenced; paraphrased and quoted material must have accompanying citations.

Question 2

Write an essay consisting of at least 500 words addressing ALL of the following topics (a. through h.):

If the elevation of locations D and E are 30 m instead of 55 m, and all other items are the same as shown in Figure 2-5 on page 26 of your textbook, what is the pressure at D in kPa? Show your work.

Explain how a Bourdon pressure gage works and how a pressure transducer works.

A 6-inch diameter pipe flowing full carries water at an average velocity of 8 ft/s. What is the flow rate in the pipe in cfs? Show your work.

In Figure 2-14(b), why is h2 less than h1?

Explain what the hydraulic grade line represents and why it is useful.

If water flows through a pressurized pipe with an HGL slope of 0.04 ft/ft over a distance of 2000 ft, what is the pressure loss in psi?

Show your work.

A particular gravity sewer conveys 2 cfs when flowing full. If instead, this sewer flows at a d/D ratio of 0.94 (see Figure 2-22 for

definition of d/D ratio), what is the flow rate in cfs?

Explain the differences between gradually varied flow and rapidly varied flow.

You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be

referenced; paraphrased and quoted material must have accompanying citations.