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1. Why is concrete the most widely used engineering material?
2. Compared to steel, what are the engineering benefits of using concrete for structures?
3. Define the following terms: fine aggregate, coarse aggregate, gravel, grout, shotcrete, hydraulic cement.
4. What are the typical unit weights for normal-weight, lightweight, and heavyweight concretes? How would you define high-strength concrete?
During the last 5 years, there has been an increase in the amount food that people are growing in their gardens. Use marginal cost- benefit analysis and the concept of opportunity cost, explain what could have changed the choice.
Suppose the daily demand for coffee in Seattle is Q^d=100,000(3-P)^2 A. What is the elasticity of demand (Ed) at a price of $2.(Please show exactly which equation is needed to find Ed here) B. At what price would the total expenditure on coffee be la..
A small nation permits free trade in good X. At the good's free-trade price of $8, domestic firms supply 6 million units and imports account for 4 million units. Recently the small country has ereted trade barriers with the result that imports hav..
At what rate is the area of the circle changing when the radius is 4 inches?
Show that (9.39) does not apply at any finite time if the economy starts at t = 0 with an arbitrary age distribution.
High performance Bicycle products company in Chapel Hill, North Carolina, sampled its shipping records for a certain day with these results: Time form Recepit of order to delivery ( in days)
If so, describe them. If not, explain why you believe that the text description of development is adequate.
A financial crisis in Vietnam has reduced the income available to Vietnamese consumers.
Describe in detail how you will conduct the research needed to determine the best alternative to recommend to your employer.
Mac Rowe doesn't sweat the petty stuff. In fact, he just cannot detect small differences. He consumes two goods, x and y. He prefers the bundle (x,y) to the bundle (x',y') if and only if (xy - x'y' > 1) . Otherwise he is indifferent between the tw..
Five separate projects have calculated rates of return of 7, 11, 15, 18, and 20 percent per year. An engineer wants to know which projects to accept on the basis of the rate of return. She learns from the finance department
List all conditions on the primitives of the model such that each firm is better o¤ after these mergers. Explain your answer (no proof needed).
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