Summarize the purpose and process of working in a successful writing group.

How important were social changes to conservatives? How important were economic and governmental changes?

A major contributor to product defects in electronic modules relates to stresses induced during thermal cycling (intermittent heating and cooling). For example, in circuit cards having active and passive components with materials of different thermal expansion coefficients, thermal stresses are the principal source of failure in component joints, such as soldered and wired connections. Although concern is generally for fatigue failure resulting from numerous excursions during the life of a product, it is possible to identify defective joints by performing accelerated thermal stress tests before the product is released to the customer. In such cases, it is important to achieve rapid thermal cycling to minimize disruptions to production schedules. A manufacturer of circuit cards wishes to develop an apparatus for imposing rapid thermal transients on the cards by subjecting them to forced convection characterized by a relation of the form $\overline{N u}_{L}=C R e_{L}^{m} P r^{n}$, where m=0.8 and n=0.33. However, he does not know whether to use air $(k=0.026 \mathrm{W} / \mathrm{m} \cdot \mathrm{K}, \ \left.\nu=1.6 \times 10^{-5} \mathrm{m}^{2} / \mathrm{s}, \quad P r=0.71\right)$ or a dielectric liquid $\left(k=0.064 \mathrm{W} / \mathrm{m} \cdot \mathrm{K}, \quad \nu=10^{-6} \mathrm{m}^{2} / \mathrm{s}, \quad P r=25\right)$ as the working fluid. Assuming equivalent air and liquid velocities and validity of the lumped capacitance model for the components, obtain a quantitative estimate of the ratio of the thermal time constants for the two fluids. What fluid provides the faster thermal response?

You are an economic adviser to a candidate for national office. She asks you for a summary of the economic consequences of a balanced-budget rule for the federal government and for your recommendation on whether she should support such a rule. How do you respond?

In what ways was the relationship between monarchs and social elites mutually beneficial during the eighteenth century?

Draw a graph of the cost behavior for each of the following costs incurred by the Mountain Summit Hospital. The hospital measures monthly activity in patient days. Label both axes and the cost line in each graph.

$1.$ The cost of food varies in proportion to the number of patient days of activity. In January, the hospital provided $3,000$ patient days of care, and food costs amounted to $\$ 24,000$.

$2.$ The cost of salaries and fringe benefits for the administrative staff totals $\$ 12,000$ per month.

$3.$ The hospital's laboratory costs include two components: $(a) \$ 40,000$ per month for compensation of personnel and depreciation on equipment and $(b) \$ 10$ per patient day for chemicals and other materials used in performing the tests.

$4.$ The cost of utilities depends on how many wards the hospital needs to use during a particular month. During months with activity under $2,000$ patient days of care, two wards are used, resulting in utility costs of $\$ 10,000$. During months with greater than $2,000$ patient days of care, three wards are used, and utility costs total $\$ 15,000$.

$5.$ Many of the hospital's nurses are part-time employees. As a result, the hours of nursing care provided can be easily adjusted to the amount required at any particular time. The cost of wages and fringe benefits for nurses is approximately $\$ 2,500$ for each block of $200$ patient days of care provided during a month. For example, nursing costs total $\$ 2,500$ for $1$ to $200$ patient days, $\$ 5,000$ for 201 to 400 patient days, $\$ 7,500$ for $401$ to $600$ patient days, and so forth.

Commercial contractors and home improvement merchants like Lowe's and Home Depot can purchase roofing and siding supplies from Great Plains Distributors Inc. The business owner is curious to know how different factors affect how much fiber-cement siding is sold. In the United States, the corporation operates 26 marketing districts. It gathered data on the following factors in each district: sales volume (in thousands of dollars), advertising spending (in thousands of dollars), the number of active accounts, the number of rival brands, and an assessment of market potential.

$$\begin{array}{|ccccc|} \begin{array}{c} \text { Sales } \\ \text { (000s) } \end{array} & \begin{array}{c} \text { Advertising } \\ \text { Dollars } \\ \text { (000s) } \end{array} & \begin{array}{c} \text { Number of } \\ \text { Accounts } \end{array} & \begin{array}{c} \text { Number of } \\ \text { Competitors } \end{array} & \begin{array}{c} \text { Market } \\ \text { Potential } \end{array} \\ \hline 79.3 & 5.5 & 31 & 10 & 8 \\ 200.1 & 2.5 & 55 & 8 & 6 \\ 163.2 & 8.0 & 67 & 12 & 9 \\ 200.1 & 3.0 & 50 & 7 & 16 \\ 146.0 & 3.0 & 38 & 8 & 15 \\ 177.7 & 2.9 & 71 & 12 & 17 \\ \vdots & \vdots & \vdots & & \\ 93.5 & 4.2 & 26 & 8 & 3 \\ 259.0 & 4.5 & 75 & 4 & 9 \\ 331.2 & 5.6 & 71 & & \\ \hline \end{array}$$

Find the most accurate sales predictors by performing a multivariate regression analysis. Using this, determine the variance inflation factor for each of the independent variables. Are there any problems?

Unemployment programs under the Social Security Administration are controlled directly by the federal government. True or False?

Let X be the number of students who show up for a professor’s office hour on a particular day. Suppose that the pmf of X is $p(0) = .20, p(1) = .25, p(2) = .30, p(3) = .15,$ and $p(4) = .10$. What is the probability that the professor shows up?

Refer to the financial statements of American Eagle Outfitters in Appendix B, Urban Outfitters in Appendix C, and the Industry Ratio Report in Appendix D at the end of this book.

Required:

1. What was Advertising Expense for each company for the most recent year? Where did you find the information?

2. Compute the percentage of Advertising Expense to Net Sales for the most recent year for both companies. Which company incurred the higher percentage? Show computations. Are you able to perform the same comparison for the previous two years? If so, show the computations. If not, explain why not.

3. Compare the Advertising Expense to Net Sales ratio for the most recent year computed in requirement (2) to the industry average found in the Industry Ratio Report (Appendix D). Were these two companies spending more or less than their average competitor on advertising (on a relative basis)? What does this ratio tell you about the general effectiveness of each company’s advertising strategy?

4. Both companies include a note to the financial statements explaining the accounting policy for advertising. How do the policies differ, if at all?

5. Compute each company’s net profit margin for the three years reported. What do your results suggest to you about each company over time and in comparison to each other?

6. Compare each company’s net profit margin for the most recent year to the industry average net profit margin in the Industry Ratio Report. Were these two companies performing better or worse than the average company in the industry?

Is there sufficient evidence to conclude that the General Social Survey in 2010 overrepresented at least one race (RACE)?

The reaction $\mathrm { NO } ( g ) + \mathrm { O } _ { 3 } ( g ) \longrightarrow \mathrm { NO } _ { 2 } ( g ) + \mathrm { O } _ { 2 } ( g )$ was studied by performing two experiments. In the first experiment (results shown in following table), the rate of disappearance of NO was followed in a large excess of $\mathrm { O } _ { 3 . }$ (The $\left[ \mathrm { O } _ { 3 } \right]$ remains effectively constant at $1.0 \times 10 ^ { 14 }$ molecules/cm $^ { 3 } . )$

$$\begin{array} { c c } { \text { Time } } & { [ \mathrm { NO } ] } \\ { \text { (ms) } } & { \text { (molecules/cm } ^ { 3 } ) } \\ \hline { 0 } & { 6.0 \times 10 ^ { 8 } } \\ { 100 \pm 1 } & { 5.0 \times 10 ^ { 8 } } \\ { 500 \pm 1 } & { 2.4 \times 10 ^ { 8 } } \\ { 700 \pm 1 } & { 1.7 \times 10 ^ { 8 } } \\ { 1000 \pm 1 } & { 9.9 \times 10 ^ { 7 } } \end{array}$$

In the second experiment, $[ \mathrm { NO } ]$ was held constant at $2.0 \times 10 ^ { 14 }$ molecules/cm $^ { 3 } .$ The data for the disappearance of $\mathrm { O } _ { 3 }$ were as follows:

$$\begin{array} { c c } { \text { Time } } & { \left[ \mathrm { O } _ { 3 } \right] } \\ { ( \mathrm { ms } ) } & { \text { (molecules/cm } ^ { 3 } ) } \\ \hline { 0 } & { 1.0 \times 10 ^ { 10 } } \\ { 50 \pm 1 } & { 8.4 \times 10 ^ { 9 } } \\ { 100 \pm 1 } & { 7.0 \times 10 ^ { 9 } } \\ { 200 \pm 1 } & { 4.9 \times 10 ^ { 9 } } \\ { 300 \pm 1 } & { 3.4 \times 10 ^ { 9 } } \end{array}$$

What is the value of the rate constant for the overall rate law? $\text {Rate} = k [ \mathrm { NO } ] ^ { x } [ \mathrm { O } _ { 3 } ] ^ { y }.$

A complex number is a number in the form $a+b i$, where $a$ and $b$ are real numbers and $i$ is $\sqrt{-1}$. The numbers $\mathrm{a}$ and $\mathrm{b}$ are known as the real part and imaginary part of the complex number, respectively. You can perform addition, subtraction, multiplication, and division for complex numbers using the following formulas:

$$\begin{gathered} a+b i+c+d i=(a+c)+(b+d) i \\ a+b i-(c+d i)=(a-c)+(b-d) i \\ (a+b i) *(c+d i)=(a c-b d)+(b c+a d) i \\ (a+b i) /(c+d i)=(a c+b d) /\left(c^2+d^2\right)+(b c-a d) i /\left(c^2+d^2\right) \end{gathered}$$

You can also obtain the absolute value for a complex number using the following formula:

$$|a+bi|=\sqrt{a^2+b^2}$$

Design a class named Complex for representing complex numbers and the methods add, subtract, multiply, divide, and abs for performing complexnumber operations, and override toString method for returning a string representation for a complex number. The toString method returns (a + bi) as a string. If b is 0, it simply returns a. Provide three constructors Complex(a, b), Complex(a), and Complex(). Complex() creates a Complex object for number 0 and Complex(a) creates a Complex object with 0 for b. Also provide the getRealPart() and getImaginaryPart() methods for returning the real and imaginary part of the complex number, respectively. Write a test program that prompts the user to enter two complex numbers and displays the result of their addition, subtraction, multiplication, and division.

EZ-Seat, Inc., manufactures two types of reclining chairs, Standard and Ergo. Ergo gives support for the body through a complex set of sensors and requires great care in manufacturing to avoid damage to the material and frame. Standard is a conventional recliner, uses standard materials, and is simpler to manufacture. EZ-Seat’s results for the last fiscal year are shown in the statement on the following page.

$$\begin{array}{c} \textbf{EZ-SEAT, INC. }\\ \textbf{Income Statement}\\ \end{array}$$

EZ-Seat currently uses labor costs to allocate all overhead, but management is considering implementing an activity-based costing system. After interviewing the sales and production staff, management decides to allocate administrative costs on the basis of direct labor costs but to use the following bases to allocate the remaining costs:

Required
Restate the income statement for EZ-Seat using direct labor costs as the only overhead allocation base.