The secondary voltage is $12.6 V_{\text {rms }}$ when the line voltage is $115 V_{\text {rms }}$. During the day, the power line varies by $\pm 10$ percent. The resistors have tolerances of $\pm 5$ percent. The $1 \mathrm{~N} 4733 \mathrm{~A}$ has a tolerance of $\pm 5$ percent and a Zener resistance of $7 \Omega$. If $R_2$ equals $560 \Omega$, what is the maximum possible value of the Zener current at any instant during the day?

The local community feels that secondary school education is a necessity and that lack of education leads to a number of social problems. As a result, the local school board has decided to take action to reverse the rising dropout rate. The board has voted to provide funds to encourage students to remain in school and earn their high school diplomas. The idea is to treat secondary education like a job and pay students. The board, however, could not agree on the details for implementing this new plan. Consequently, you have been hired to devise a system to compensate students for staying in school and earning a diploma.

As you devise your compensation scheme, be sure it meets the following general control objectives for the payroll cycle:

• All transactions are properly authorized.
• Everyone is assigned to do productive work, and they do it efficiently and effectively.
• All transactions are accurately recorded and processed.
• Accurate records are maintained.
• All disbursements are proper.

Write a proposal that addresses these five questions:

c. How will the payments be processed?

The local community feels that secondary school education is a necessity and that lack of education leads to a number of social problems. As a result, the local school board has decided to take action to reverse the rising dropout rate. The board has voted to provide funds to encourage students to remain in school and earn their high school diplomas. The idea is to treat secondary education like a job and pay students. The board, however, could not agree on the details for implementing this new plan. Consequently, you have been hired to devise a system to compensate students for staying in school and earning a diploma.

As you devise your compensation scheme, be sure it meets the following general control objectives for the payroll cycle:

• All transactions are properly authorized.
• Everyone is assigned to do productive work, and they do it efficiently and effectively.
• All transactions are accurately recorded and processed.
• Accurate records are maintained.
• All disbursements are proper.

Write a proposal that addresses these five questions:

e. When will the payments be made?

Using what you have learned about the United Nations' efforts as peacekeeping forces, as well as from additional research about the United Nations, write a "white paper"-a short summary of a topic-on the work the United Nations does around the world during times of conflict and unrest. Cite specific examples of its efforts, and evaluate its effectiveness at meeting the goals of the UN. Include evidence from at least one primary source and at least one secondary source in your white paper.

The atmospheres of the gas giant planets (Jupiter, Saturn, Uranus, and Neptune) are mostly comprised of hydrogen (H2) followed by helium (He). The atmospheres of the terrestrial planets are mostly comprised of carbon dioxide (CO2) followed by nitrogen (N2) for Venus and Mars, and for Earth, mostly Nitrogen (N2) followed by Oxygen (O2). Write a program that outputs this information in a chart with four columns for the type of planet, the name of the planet, its primary atmospheric gas, and secondary atmospheric gas.

Write structural formulas for each of the following: (a) Three ethers with the formula $\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}.$ (b) Three primary alcohols with the formula $\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}.$ (c) A secondary alcohol with the formula $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}.$ (d) A tertiary alcohol with the formula $\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}.$ (e) Two esters with the formula $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{2}$ (f) Four primary alkyl halides with the formula $\mathrm{C}_{5} \mathrm{H}_{11} \mathrm{Br}.$ (g) Three secondary alkyl halides with the formula $\mathrm{C}_{5} \mathrm{H}_{11} \mathrm{Br}.$ (h) A tertiary alkyl halide with the formula $\mathrm{C}_{5} \mathrm{H}_{11} \mathrm{Br}.$ (i) Three aldehydes with the formula $\mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}.$ (j) Three ketones with the formula $\mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}.$ (k) Two primary amines with the formula $\mathrm{C}_{3} \mathrm{H}_{9} \mathrm{N}.$ (l) A secondary amine with the formula $\mathrm{C}_{3} \mathrm{H}_{9} \mathrm{N}.$ (m) A tertiary amine with the formula $\mathrm{C}_{3} \mathrm{H}_{9} \mathrm{N}.$ (n) Two amides with the formula $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NO}.$

Indicate whether each of the following statements concerning secondary protein structure is true or false.

a. Hydrogen bonds present in an a-helix structure always involve two adjacent amino acids.

b. Both $\alpha$-helix and $\beta$-pleated sheet structures can be present in the same protein.

c. In a $\beta$-pleated sheet structure, the hydrogen bonding is always between different protein chains.

d. In an $\alpha$-helix, all of the amino acid R groups lie inside the helix.

A patient was admitted following a motor vehicle accident with multiple fractured ribs. Respiratory assessment includes signs/symptoms of secondary pneumothorax. Which are the most common assessment findings associated with a pneumothorax? (Select all that apply.)

1. Sharp pleuritic pain that worsens on inspiration
2. Crackles over lung bases of affected lung
3. Tracheal deviation toward the affected lung
4. Worsening dyspnea
5. Absent lung sounds to auscultation on affected side

The Statistical Abstract of the United States, 1997, reports that 77% of secondary schools in the United States have Internet access. Suppose that 8 U.S. secondary schools are selected at random. Let X= the number of secondary schools chosen who have Internet access. This exercise uses the statistical software Minitab to answer several questions. To calculate binomial probabilites with Minitab, using pull-down menus, begin by entering the integers 0 to 8 in column 1 and naming this column VALUES. Then select Calc > Probability Distributions > Binomial. Then select Probability to indicate that you want individual probabilities. Specify the Number of trials and the Probability of success. Select Input column and specify VALUES in column Cl to tell Minitab to calculate binomial probabilities for each of the values in that column. Then click on OK. The following results are produced:

$$\begin{array}{cr}\text { MTB }> & \text { PDF 'VALUES'; } \\ \text { SUBC }>\text { Binomial } 8.77 . \\ K & \text { P( } X=K) \\ 0.00 & 0.0000 \\ 1.00 & 0.0002 \\ 2.00 & 0.0025 \\ 3.00 & 0.0165 \\ 4.00 & 0.0689 \\ 5.00 & 0.1844 \\ 6.00 & 0.3087 \\ 7.00 & 0.2953 \\ 8.00 & 0.1236\end{array}$$

To calculate the cumulative distribution, make the same menu choices, except this time select Cumulative probability instead of Probability. The following output is produced:

$$\begin{array}{rr}\text { MTB }>\text { CDF 'VALUES' } \\ \text { SUBC> }>\text { Binomial } 8.77 . \\ \text { K } & \text { P( X LESS } \\ 0.00 & 0.0000 \\ 1.00 & 0.0002 \\ 2.00 & 0.0027 \\ 3.00 & 0.0191 \\ 4.00 & 0.0880 \\ 5.00 & 0.2724 \\ 6.00 & 0.5811 \\ 7.00 & 0.8764 \\ 8.00 & 1.0000\end{array}$$

MTB $>$

From the printouts, calculate the probability that out of the 8 schools chosen, the number having Internet access is at most 7.

The cone rolls on the horizontal surface, which is fixed with respect to an earth-fixed reference frame. The $x$ axis of the secondary reference frame remains coincident with the cone's axis, and the $z$ axis remains horizontal. As the cone rolls, the $z$ axis rotates in the horizontal plane with a constant angular velocity of $2 \mathrm{rad} / \mathrm{s}$. Determine the acceleration relative to the earth-fixed reference frame of the point of the base of the cone with coordinates $x=0.4 \mathrm{~m}, y=0$, and $z=0.2 \mathrm{~m}$.

Recently chemical engineers have become involved in the area known as waste minimization. This involves the operation of a chemical plant so that impacts on the environment are minimized. Suppose a refinery develops a product Z1 made from two raw materials X and Y. The production of 1 metric tonne of the product involves 1 tonne of X and 2.5 tonnes of Y and produces 1 tonne of a liquid waste W. The engineers have come up with three alternative ways to handle the waste: Produce a tonne of a secondary product Z2 by adding an additional tonne of X to each tonne of W. Produce a tonne of another secondary product Z3 by adding an additional tonne of Y to each tonne of W. Treat the waste so that it is permissible to discharge it. The products yield profits of $2500, -$50, and $200/tonne for Z1, Z2, and Z3, respectively. Note that producing Z2 actually creates a loss. The treatment process costs$300/tonne. In addition, the company has access to a limit of 7500 and 10,000 tonnes of X and Y, respectively, during the production period. Determine how much of the products and waste must be created in order to maximize profit

The desired daily output for an assembly line is 360 units. This assembly line will operate 450 minutes per day. The following table contains information on this product’s task times and precedence relationships. Balance this line using the largest number of following tasks. Use the longest task time as a secondary criterion.

The vertical shaft supporting the disk antenna is rotating with a constant angular velocity $\omega_0=0.2 \mathrm{rad} / \mathrm{s}$. The angle $\theta$ from the horizontal to the antenna's axis is $30^{\circ}$ at the instant shown and is increasing at a constant rate of $15^{\circ}$ per second. The secondary $x y z$ coordinate system shown is fixed with respect to the dish. (a) What is the dish's angular acceleration relative to an earthfixed reference frame? (b) Determine the acceleration of the point of the antenna with coordinates $(4,0,0) \mathrm{m}$ relative to an earth-fixed reference frame.

Match the term in Column A with its corresponding description in Column B.

$$\begin{aligned} \text{Column A}\qquad \qquad \qquad &\text{Column B}\\ \text{childhood}\qquad \qquad \qquad\quad & \text{a. period during which the deciduous teeth are lost}\\ &\text{b. period during which closure of the bone growth plates occurs}\\ &\text{c. period that begins at birth}\\ &\text{d. senescence}\\ &\text{e. period during which the secondary sex characteristics usually begin to develop}\\ & & & & & \end{aligned}$$