A window air conditioner that consumes 1 kW of electricity when running and has a coefficient of performance of 3 is placed in the middle of a room, and is plugged in. The rate of cooling or heating this air conditioner will provide to the air in the room when running is (a) 3 kJ/s, cooling (b) 1 kJ/s, cooling (c) 0.33 kJ/s, heating (d) 1 kJ/s, heating (e) 3 kJ/s, heating

A refrigeration cycle is executed with R-134a under the saturation dome between the pressure limits of 1.6 and 0.2 MPa. If the power consumption of the refrigerator is 3 kW, the maximum rate of heat removal from the cooled space of this refrigerator is (a) 0.45 kJ/s (b) 0.78 kJ/s (c) 3.0 kJ/s (d) 11.6 kJ/s (e) 14.6 kJ/s

The drinking water needs of an office are met by cooling tab water in a refrigerated water fountain from 23 to $6^{\circ} \mathrm{C}$ at an average rate of 10 kg/h. If the COP of this refrigerator is 3.1, the required power input to this refrigerator is (a) 197 W (b) 612 W (c) 64 W (d) 109 W (e) 403 W

A window-mounted air-conditioner unit is placed on a laboratory bench and tested in cooling mode using 750Wof electric power with a COP of 1.75. What is the cooling power capacity and what is the net effect on the laboratory?

On a hot summer day, the air in a well-sealed room is circulated by a 0.50-hp fan driven by a 65 percent efficient motor. (Note that the motor delivers 0.50 hp of net shaft power to the fan.) The rate of energy supply from the fan-motor assembly to the room is (a) 0.769 kJ/s (b) 0.325 kJ/s (c) 0.574 kJ/s (d) 0.373 kJ/s (e) 0.242 kJ/s

Consider a room air conditioner using a Carnot cycle at maximum theoretical efficiency and operating between the temperatures of $18.0^{\circ} \mathrm{C}$ (indoors) and $35.0^{\circ} \mathrm{C}$ (outdoors). For each $1.00 \mathrm{~J}$ of heat flowing out of the room into the air conditioner: a) How much heat flows out of the air conditioner to the outdoors?

A typical new household refrigerator consumes about 680 kWh of electricity per year and has a coefficient of performance of 1.4. The amount of heat removed by this refrigerator from the refrigerated space per year is (a) 952 MJ/yr (b) 1749 MJ/yr (c) 2448 MJ/yr (d) 3427 MJ/yr (e) 4048 MJ/yr

In the 2008 baseball season, first baseman Ryan Howard of the Philadelphia Phillies led the Major Leagues with 48 home runs (HR) and 146 runs batted in (RBI). Overall, using all players with at least 300 plate appearances, the mean number of HR was $14.9$ with a standard deviation of $9.8$, whereas the mean number of RBI was $62.5$ with a standard deviation of $25.5$. Which was the more impressive PERFORMANCE? Explain, using the methods of this chapter.

Refrigerant 134a is the working fluid in an ideal vaporcompression refrigeration cycle operating at steady state. Refrigerant enters the compressor at 1 .4 bar, $-12^{\circ} \mathrm{C},$ and the condenser pressure is 9 bar. Liquid exits the condenser at $32^\circ C.$ The mass flow rate of refrigerant is 7 kg/min. Determine a. the compressor power, in kW. b. the refrigeration capacity, in tons. c. the coefficient of performance.

A new surgical procedure is said to be successful 80% of the time. Suppose the operation is performed five times and the results are assumed to be independent of one another. a. What is the probability that all five operations are successful? b. What is the probability that exactly four are successful? c. What is the probability that less than two are successful? d. If less than two operations were successful, how would you feel about the performance of the surgical team?

Seven performers A, B, C, D, E, F, and G are to appear in a fund raiser. The order of performance is determined by random selection. Find the probability that

$$\textbf{a.}\hspace{10pt}\text{D will perform first.}$$

$$\textbf{b.}\hspace{10pt}\text{E will perform sixth and B will perform last.}$$

$$\textbf{c.}\hspace{10pt}\text{The comedians will perform in the following order:C, D, B, A, G, F, E.}$$

$$\textbf{d.}\hspace{10pt}\text{CF or G will perform first.}$$

Apple Inc. is a multinational technology company that designs, develops, manufactures, and sells innovative consumer electronics products and services around the globe. Its products include laptop (e.g., MacBook) and desktop (e.g., iMac) computers, mobile phones (e.g., iPhone), MP3 players (e.g., iPod nano), tablets (e.g., iPad), and various other devices (e.g., Apple Watch, Apple TV, etc.). Its services include personalized, onsite (e.g., at Apple Store) group and individual training sessions, fitness notifications (e.g., from Apple Watch), audio and video streaming, and online and phone help services. Founded in Cupertino, California, in 1976, Apple has been a success as measured by almost any standard. As one example, Apple recently reported the largest ever recorded quarterly profit by a single public corporation! While a history of such amazing performance is admirable, publicly traded companies must always focus on the future and convince investors, and various other key stakeholders, that they will maintain-or even improve-performance in the future.

1. Identify the five most important stakeholders for Apple Inc. Briefly explain how you selected these five stakeholders and why they are important to Apple.

2. Describe the specific approach you believe Apple’s management team should employ to engage with each of the five stakeholders you identified in Requirement 1. For each stakeholder engagement approach, briefly explain the type of information or performance measures that Apple’s management team should provide to the stakeholder (or receive from the stakeholder) to improve the effectiveness of the engagement.

Performance Bike Co. is a wholesaler of motorcycle supplies. An aging of the company's accounts receivable on December 31 and a historical analysis of the percentage of uncollectible accounts in each age category are as follows:

$$\begin{array}{lrc} \text { Age Interval } & \text { Balance } & \begin{array}{c} \text { Percent } \\ \text { Uncollectlble } \end{array} \\ \hline \text { Not past due } & \$ 3,250,000 & 0.8 \% \\ 1-30 \text { days past due } & 1,050,000 & 2.4 \\ 31-60 \text { days past due } & 780,000 & 7.0 \\ 61-90 \text { days past due } & 320,000 & 18.0 \\ 91-180 \text { days past due } & 240,000 & 34.0 \\ \text { Over } 180 \text { days past due } & \underline{\hspace{15pt}150,000} & 85.0\\ &\underline{\underline{\$5,790,000}} \end{array}$$

Assume that the allowance for doubtful accounts for Performance Bike Co. had a debit balance of $28,400 as of December 31.

Journalize the adjusting entry for uncollectible accounts as of December 31.

Determine the optimal control signal u for the system $\dot{\mathbf{x}}=\mathbf{A x}+\mathbf{B} u$ defined by

$$\mathbf{A}=\left[\begin{array}{rr}{0} & {1} \\ {0} & {-1}\end{array}\right], \quad \mathbf{B}=\left[\begin{array}{l}{0} \\ {1}\end{array}\right]$$

. Where such that the following performance index is minimized: $J=\int_{0}^{\infty}\left(\mathbf{x}^{T} \mathbf{x}+u^{2}\right) d t$