Consider the piping system of the figure, with all the dimensions, parameters, minor loss coefficients, etc., of the earlier problem. The pump's performance follows a parabolic curve fit, $H_{\text {wailate }}=H_0-a \dot{V}^2$, where $H_0=19.8 \mathrm{~m}$ is the pump's shutoff head, and $a=0.00426 \mathrm{~m} /(\mathrm{Lpm})^2$ is a coefficient of the curve fit. Find the operating volume flow rate $\dot{V}$ in Lpm (liters per minute), and compare it with that of the earlier problem. Discuss.

Of the 281 players with at least 300 plate appearances in the 2008 Major League Baseball season, Jeff Mathis of the Los Angeles Angels had the lowest batting average ( $0.194)$ and Brad Wilkerson of the Toronto Blue Jays scored the fewest runs (21). Overall, the mean batting average was $0.272$, with a standard deviation of $0.027$, and the mean number of runs scored was $65.0$, with a standard deviation of 23.6. Which PERFORMANCE was worse? Explain, using the methods of this chapter.

An office building requires a heat transfer rate of $20\ \mathrm{kW}$ to maintain the inside temperature at $21^{\circ} \mathrm{C}$ when the outside temperature is $0^{\circ} \mathrm{C}$. A vapor-compression heat pump with Refrigerant $22\mathrm{a}$ as the working fluid is to be used to provide the necessary heating. The compressor operates adiabatically with an isentropic efficiency of $82 \%$. Specify appropriate evaporator and condenser pressures of a cycle for this purpose assuming $\Delta T_{\text {cond }}=\Delta T_{\text {cvap }}=10^{\circ} \mathrm{C}$, as shown in figure. The states are numbered as in figure. The refrigerant exits the evaporator as saturated vapor and exits the condenser as saturated liquid at the respective pressures. Determine the (a) mass flow rate of refrigerant, in $\mathrm{kg} / \mathrm{s}$. (b) compressor power, in $\mathrm{kW}$. (c) coefficient of performance and compare with the coefficient of performance for a Carnot heat pump cycle operating between reservoirs at the inside and outside temperatures, respectively.. Compare the results with those of previous problem and discuss.

An engineer living at an elevation of $2500 \mathrm{ft}$ is conducting experiments to verify predictions of glider performance. To process data, the density of ambient air is needed. The engineer measures temperature $\left(74.3^{\circ} \mathrm{F}\right)$ and atmospheric pressure $(27.3$ inches of mercury). Compute density in units of $\mathrm{kg} / \mathrm{m}^3$. Compare the calculated value with data from the mentioned table and make a recommendation about the effects of elevation on density; that is, are the effects of elevation significant?

Exercise 2.64 described the survey the Red Lobster Restaurant chain conducts to monitor the performance of individual restaurants. One of the questions asks customers to rate the overall quality of their last visit. The listed responses are Poor (1), Fair (2), Good (3), Very good (4), and Excellent (5). The survey also asks respondents whether their children accompanied them (1= Yes and 2 = No) to the restaurant. Is there sufficient evidence to infer that ratings and whether children accompanied the customer are related?

Match the plot with the description of the sample.

$$\begin{array}{l|l} 6 & 78 \\ 7 & 455888 \\ 8 & 1355889 \\ 9 & 00024 \end{array}$$

Key: $6 \mid 7=67$

a) Time (in minutes) it takes a sample of employees to drive to work

b) Grade point averages of a sample of students with finance majors

c) Top speeds (in miles per hour) of a sample of high-performance sports cars

d) Ages (in years) of a sample of residents of a retirement home

Decide whether the underlined words in the following sentences are predicate nominatives, predicate adjectives, direct objects, or indirect objects. Above each underlined word, write PN for predicate nominative, PA for predicate adjective,* DO* for direct object, or IO for indirect object.

Example 1. After he gave $\underline{\text{her}}$ a rowing $\underline{\text{lesson}}$, he felt $\underline{\text{tired}}$.

The magician appeared $\underline{\text{nervous}}$ during the beginning of her performance.

The adjusted trial balance of Estella Real Estate Appraisal at June 30, 2016, follows:

$$\begin{array}{c} \textbf{ESTELLA REAL ESTATE APPRAISAL}\\ \text{Adjusted Trial Balance}\\ \text{June 30, 2016}\\ \end{array}$$

$$\begin{array}{lrr} &\textbf{Balance}\\ \textbf{Account Title}&\textbf{Debit}&\textbf{Credit}\\ \text{Cash}&\$4,600\\ \text{Accounts Receivable}&5,300\\ \text{Office Supplies}&1,500\\ \text{Prepaid Insurance}&1,600\\ \text{Building}&77,000\\ \text{Accumulated Depreciation - Building}&&\$26,000\\ \text{Land}&13,500\\ \text{Accounts Payable}&&19,300\\ \text{Interest Payable}&&8,400\\ \text{Salaries Payable}&&1,900\\ \text{Unearned Revenue}&&5,300\\ \text{Notes Payable (long-term)}&&37,000\\ \text{Common Stock}&&3,000\\ \text{Retained Earnings}&&37,000\\ \text{Dividends}&27,200\\ \text{Service Revenue}&&48,900\\ \text{Insurance Expense}&4,300\\ \text{Salaries Expense}&33,000\\ \text{Supplies Expense}&200\\ \text{Interest Expense}&8,400\\ \text{Utilities Expense}&2,500\\ \text{Depreciation Expense - Building}&7,700\\ \text{Total}&\underline{\underline{\$186,800}}&\underline{\underline{\$186,800}}\\ \end{array}$$

Requirements

1. Prepare the company's income statement for the year ended June 30, 2016.
2. Prepare the company's statement of retained earnings for the year ended June 30, 2016.
3. Prepare the company's classified balance sheet in report form at June 30, 2016.
4. Journalize the closing entries.
5. Open the T-accounts using the balances from the adjusted trial balance, and post the closing entries to the T-accounts.
6. Prepare the company's post-closing trial balance at June 30, 2016.

Explain why the following technique for transaction execution may provide better performance than just using strict two-phase locking: First execute the transaction without acquiring any locks and without performing any writes to the database as in the validation-based techniques, but unlike the validation techniques do not perform either validation or writes on the database. Instead, rerun the transaction using strict two-phase locking. (Hint: Consider waits for disk I/O.)

Sailmaster makes high-performance sails for competitive windsurfers. The following is information about the inputs and outputs for one model, the Windy $2000$ . Calculate the productivity in sales revenue/labor expense.

$$\begin{array}{ll} \hline\text { Units sold } & 1,217 \\ \text { Sale price each } & \$ 1,700 \\ \text { Total labor hours } & 46,672 \\ \text { Wage rate } & \$ 12 / \text { hour } \\ \text { Total materials } & \$ 60,000 \\ \text { Total energy } & \$ 4,000 \\ \hline \end{array}$$

Peal Corporation issued 4,000 shares of its $10 par value stock with a market value of$85,000 to acquire 85 percent of the common stock of Seed Company on August 31, 20X3. Seed's fair value was determined to be $100,000 on that date. Peal had previously purchased 15 percent of Seed's common stock for$9,000 on January 31, 20X1, and had carried this investment at fair value on its balance. Peal reported this investment at $15,000 on its balance sheet at August 31, 20X3, immediately prior to acquiring the remaining 85 percent of Seed's shares. On August 31, 20X3, Peal also paid appraisal fees of$3,500 and stock issue costs of $2,000 incurred in completing the acquisition of the additional shares.

Required

Give the journal entries to be recorded by Peal in completing the acquisition of the additional shares of Seed.

In a poll conducted by The New York Times and CBS News, $44 \%$ of Americans approve of the job that the Supreme Court is doing (The New York Times, June 8, 2012). Assume that at the time of the poll, this percentage applied to the entire American population. A recent survey of 1300 Americans found that $39\%$ of them are satisfied with the Supreme Court's performance. Can you draw the conclusion that the present percentage of Americans who approve of the job the Supreme Court is doing is different from $.44$ at a significance level of $2\%$t?

True or false: (a) Work can never be converted completely into heat. (b) Heat can never be converted completely into work. (c) All heat engines have the same efficiency. (d) It is impossible to transfer a given quantity of heat from a cold reservoir to a hot reservoir. (e) The coefficient of performance of a refrigerator cannot be greater than 1. (j) All Carnot engines are reversible. (g) The entropy of a system can never decrease. (h) The entropy of the universe can never decrease.

Data giving the number of hours a person studied compared to his or her performance on an exam are given in the table:

$$\begin{array}{c|c} \text{Hours Studied} & \text{Exam Score} \\ x & y\\ \hline 0 & 50\\ 2 & 74\\ 4 & 85\\ 6 & 90\\ 8 & 92 \end{array}$$

(a) Find a least squares line of best fit to the above data. (b) What prediction would this line make for a student who studied 9 hours?