Mercury has $m p=-38.8^{\circ} \mathrm{C}$ and $\mathrm{bp}=356.6^{\circ} \mathrm{C}$. What, if any, phase changes take place under the following conditions at $1.0$ atm pressure? (a) The temperature of a sample is raised from $-30^{\circ} \mathrm{C}$ to $365^{\circ} \mathrm{C}$. (b) The temperature of a sample is lowered from $291 \mathrm{~K}$ to $238 \mathrm{~K}$. (c) The temperature of a sample is lowered from $638 \mathrm{~K}$ to $231 \mathrm{~K}$.

Draw the iron core of a three-phase transformer.

Iodine has $\mathrm{mp}=113.7^{\circ} \mathrm{C}$ and $\mathrm{bp}=184.4^{\circ} \mathrm{C}$. What, if any, phase changes take place under the following conditions at $1.0 \mathrm{~atm}$ pressure? (a) The temperature of a solid sample is held at $113.7^{\circ} \mathrm{C}$ while heat is added. (b) The temperature of a sample is lowered from $452 \mathrm{~K}$ to $389 \mathrm{~K}$.

What are some differences between bacteria and viruses? How do certain pathogens develop drug resistance? What policies and programs should be enacted to protect us from drugresistant pathogens?

Make an appointment to interview someone at one of the organizations identified in Activity 1. During your visit, find answers to the following questions:

What types of programs/services does the organization provide?

A television broadcasting company asked a sample of its customers. "What type of program do you watch most frequently?" The two-way frequency table shows the results of the survey. If the company wants to decrease the number of programs offered, which type of program should it choose to cut? Explain.

$$\text{Type of Program}\\ \begin{array}{|c|c|c|c|c|c|} \hline \text{Gender} & \text { Comedy } & \text { Drama } & \text { Sports } & \text { News } & \text { Total } \\ \hline \text { Women } & 123 & 215 & 89 & 306 & 733 \\ \hline \text { Men } & 127 & 110 & 217 & 222 & 676 \\ \hline \text { Total } & 250 & 325 & 306 & 528 & 1,409\\ \hline \end{array}$$

What conservative programs did Nixon support?

As the older population grows, how will it affect your life? Would you be willing to pay higher taxes to support government programs for older adults? Why or why not?

The pressure inside a bottle of champagne is 4.5 atm higher than the air pressure outside. The neck of the bottle has an inner radius of 1.0 cm. What is the frictional force on the cork due to the neck of the bottle?

Rewrite the following sentence to avoid gender-biased pronouns. Show three versions of the sentence given.

If any student needs assistance, Kathy Yerkes will help him.

a.

b.

c.

Complete the following sentence with a word or phrase.

Software programs used on smartphones to help with fitness are called ______ .

Interview three athletes from different sports in your school. How do their preseason conditioning programs differ?

Where is the lowest and highest pressure in the vascular system found?

A sealed cylinder contains a sample of ideal gas at a pressure of $2.0 \mathrm{~atm}$. The rms speed of the molecules is $v_0$. If the rms speed is then reduced to $0.90 v_0$, what is the pressure of the gas?