Find the maximum possible $\mathrm{COP}$ for a freezer that maintains $-5^{\circ} \mathrm{C}$ when the surrounding room temperature is $25^{\circ} \mathrm{C}$.

In given of the following sentence, underline the correct word or words in parentheses.
I found (your, you're) bracelet where you had left it in the locker room.

Estimate the number of air molecules in a room of length 6.5 m, width 3.1 m, and height 2.5 m. Assume the temperature is $22^{\circ} \mathrm{C}$. How many moles does that correspond to?

Complete the sentence in a way that shows you understand the meaning of the italicized vocabulary word. Anna's meticulous cleaning habits ensure that her room is always...

If all the students in problem $1$ were equally divided among three rooms, how many students would be in each room?

The width of Ben's rectangular family room is 3 ft less than the length. The perimeter is 70 ft. Which equation can be used to find the length l of the room?

$$\left. \begin{array} { l } F.{ 70 = \ell - 3 } \\ G.{ 70 = 2 \ell - 3 } \end{array} \right.\quad \left. \begin{array} { l } H.{ 70 = 2 ( \ell - 3 ) } \\ I.{ 70 = 2 ( 2 \ell - 3 ) } \end{array} \right.$$

A student uses a $100.00 \mathrm{~W}$, $115.00 \mathrm{~V}$ radiant heater to heat the student's dorm room, during the hours between sunset and sunrise, $6:00$ p.m. to $7:00$ a.m. $(a)$ What current does the heater operate at? $(b)$ How many electrons move through the heater? $(c)$ What is the resistance of the heater? $(d)$ How much heat was added to the dorm room?

Complete the sentence in a way that shows you understand the meaning of the italicized vocabulary word. Anna's meticulous cleaning habits ensure that her room is always ...

Tiling A square ceramic tile is 18 inches in length. If a room is 12 feet by 18 feet, how many tiles are needed?

Find the exponential generating function for the number of ways to distribute r people into six different rooms with between two and four in each room.

Identify each of the following statements as true or false, and briefly explain your answer.
A room that has been thoroughly cleaned would be described as squalid.

A student uses a 100.00-W, 115.00-V radiant heater to heat the student’s dorm room, during the hours between sunset and sunrise, 6:00 p.m. to 7:00 a.m. (a) What current does the heater operate at? (b) How many electrons move through the heater? (c) What is the resistance of the heater? (d) How much heat was added to the dorm room?

Use what you know about the Vocabulary words to answer the following question.

When did you strew things across a room? Why did you do it?

Would you expect this rule of thumb to apply at room temperature for the reaction profiled in Figure 20-10? Explain.