Match the definitions with the words.

a. un article b. une pi$\`e$ce c. un po$\`e$me d. un roman e. un conte f. un journal g. un magazine h. une bande dessin$\'e$e

Oxygen $\left(\mathrm{O}_{2}\right)$ is heated during a steady-flow process at 1 atm from 298 to 3000 K at a rate of 0.5 kg/min. Determine the rate of heat supply needed during this process, assuming (a) some $\mathrm{O}_{2}$ dissociates into O and (b) no dissociation takes place.

$(a)$ Find the amount of heat that must be extracted from $1.5 \mathrm{~kg}$ of steam at $110^{\circ} \mathrm{C}$ to convert it to ice at $0.0^{\circ} \mathrm{C}$. $(b)$ What speed would this $1.5 \mathrm{~kg}$ block of ice have if its translational kinetic energy were equal to the thermal energy calculated in part $(a)$?

Test each of the following equation for exactness. If it is not exact, try to find an integrating factor.

$\left(e^x \sin y+e^{-y}\right) d x-\left(x e^{-y}-e^x \cos y\right) d y=0$.

Consider the single-input, single-output system is described by

$$\begin{aligned} . \mathbf{x}(t) & =\mathbf{A} \mathbf{x}(t)+\mathbf{B} u(t) \\ y(t) & =\mathbf{C x}(t) \end{aligned}$$

where

$$\mathbf{A}=\left[\begin{array}{cc} 0 & 1 \\ 3-K & -2-K \end{array}\right], \mathbf{B}=\left[\begin{array}{l} 0 \\ 1 \end{array}\right], \mathbf{C}=\left[\begin{array}{ll} 1 & -1 \end{array}\right]$$

Compute the characteristic polynomial and plot the root locus as $0 \leq K<\infty$. For what values of $K$ is the system stable?

Put the following breakfast items in the correct nutrition categories below.

• Du pain perdu
• Des cr$\^e$pes
• Des saucisses
• Du Nutella
• Du jus de pamplemousse
• Du bacon
• Du chocolat chaud
• Une tartine
• Du caf$\'e$ au lait
• Du th$\'e$
• Un croissant
• De la confiture
• Des ${\text{\oe}}$ufs sur le plat
• Des ${\text{\oe}}$ufs brouill$\'e$s
• Du pain grill$\'e$
• Du sirop d'$\'e$rable
• Des c$\'e$r$\'e$als

Determine whether each statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement. The equation y=mx+b shows that no line can have a y-intercept that is numerically equal to its slope.

Vous préparez le diner. Demandez a un(e) camarade s'il y a les choses suivantes dans le réfrigérateur.

1. le jus d'orange?

2. le pain?

3. la glace?

4. le beurre?

5. le jambon?

6. l'eau minérale?

7. le jus de pomme?

8. le fromage?

9. la mayonnaise?

10. le ketchup?

Calculate the mass percent of solute in the following solutions.

a. 6.50 g of NaCl dissolved in 85.0 g of $\text{H}_2\text{O}$

b. 2.31 g of LiBr dissolved in 35.0 g of $\text{H}_2\text{O}$

c. 12.5 g of $\text{KNO}_3$ dissolved in 125 g of $\text{H}_2\text{O}$

d. 0.0032 g of NaOH dissolved in 1.2 g of $\text{H}_2\text{O}$

Identify:

a) Hohokams,

b) Anasazi,

c) Mound Builders,

d) Inuits,

e) Iroquois League.

Translate the following chemical equation into a sentence. $\mathrm { CH } _ { 4 } + 2 \mathrm { O } _ { 2 } \rightarrow \mathrm { CO } _ { 2 } + 2 \mathrm { H } _ { 2 } \mathrm { O }$

For a certain bowling league, a beginning bowler computes her handicap by taking 90% of the difference between 220 and her average score in league play. Determine the average scores that would produce a handicap of 72 or less. Also assume that a negative handicap is not possible in this league.

From the data in Figure 9-12, the formation of a gaseous anion $\mathrm{Li}^{-}$appears energetically favorable. That is, energy is given off when gaseous $\mathrm{Li}$ atoms accept electrons. Comment on the likelihood of forming a stable compound containing the $\mathrm{Li}^{-}$ion, such as $\mathrm{Li}^7 \mathrm{Li}^{-}$or $\mathrm{Na}^{+} \mathrm{Li}^{-}$.

Balance the following chemical equations: (a) $\mathrm{CaCl}_{2}+\mathrm{Na}_{2} \mathrm{CO}_{3} \rightleftharpoons \mathrm{CaCO}_{3}+\mathrm{NaCl}$ (b) $\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+\mathrm{O}_{2} \rightleftharpoons \mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}$ (c) $\mathrm{NO}_{2}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{HNO}_{3}+\mathrm{NO}$ (d) $\mathrm{C}_{4} \mathrm{H}_{10}+\mathrm{O}_{2} \rightleftharpoons \mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}$ (e) $\mathrm{Al}(\mathrm{OH})_{2}^{-} \rightleftharpoons \mathrm{Al}^{3+}+\mathrm{OH}^{-}$