If the bleeder current, $I_\text{B}$, is $15\text{ mA}$ in Fig. 7–32, solve for a. $I_1$, $I_2$, $I_3$, and $I_\text{T}$. b. $V_1$, $V_2$, and $V_3$. c. $R_1$, $R_2$, and $R_3$. d. The power dissipated by $R_1$, $R_2$, and $R_3$.

Three resistors $R_1$, $R_2$, and $R_3$ are connected in series across an applied voltage, $V_\text{T}$, of $24\text{ V}$. If $R_2$ is one-third the value of $R_\text{T}$, how much is $V_2$? a. $8\text{ V}$. b. $16\text{ V}$. c. $4\text{ V}$. d. It cannot be determined.

If the bleeder current, $I_\text{B}$, is $6\text{ mA}$ in Fig. 7–31, solve for a. $I_1$, $I_2$, $I_3$, and $I_\text{T}$. b. $V_1$, $V_2$, and $V_3$. c. $R_1$, $R_2$, and $R_3$. d. The power dissipated by $R_1$, $R_2$, and $R_3$.

If the bleeder current, $I_\text{B}$, is $10\%$ of the total load current in Fig. 7–29, solve for a. $I_1$, $I_2$, $I_3$, and $I_\text{T}$. b. $V_1$, $V_2$, and $V_3$. c. $R_1$, $R_2$, and $R_3$. d. The power dissipated by $R_1$, $R_2$, and $R_3$.

If the bleeder current, $I_\text{B}$, is $10\%$ of the total load current in Fig. 7–29, solve for a. $I_1$, $I_2$, $I_3$, and $I_\text{T}$. b. $V_1$, $V_2$, and $V_3$. c. $R_1$, $R_2$, and $R_3$. d. The power dissipated by $R_1$, $R_2$, and $R_3$.

In Fig. 7–28, calculate $I_1$, $I_2$, $I_\text{L}$, $V_\text{BG}$, and $V_\text{AG}$ with a. $S_1$ open. b. $S_1$ closed.

With $S_1$ closed in Fig. 7–27, which resistor has only the bleeder current, $I_\text{B}$, flowing through it?

In Fig. 27–30, which diode approximations are not necessary when solving for $I_\text{L}$ and $V_\text{L}$? Justify your answer.

In Fig. 7–27, calculate $I_1$, $I_2$, $I_\text{L}$, $V_\text{BG}$, and $V_\text{AG}$ with a. $S_1$ open. b. $S_1$ closed.

In Fig. 7–26, explain why the voltage, $V_\text{BG}$, decreases when the switch, $S_1$ is closed.

Steam flows at steady state through a converging, insulated nozzle, 25 cm long and with an inlet diameter of 5 cm. At the nozzle entrance (state 1), the temperature and pressure are $325^{\circ} \mathrm{C}$ and 700 kPa and the velocity is $30 \mathrm{m} \cdot \mathrm{s}^{-1}.$ At the nozzle exit (state 2), the steam temperature and pressure are $240^\circ C$ and 350 kPa. Property values are:

$$\begin{array}{ll}{H_{1}=3112.5 \mathrm{kJ} \cdot \mathrm{kg}^{-1}} & {V_{1}=388.61 \mathrm{cm}^{3} \cdot \mathrm{g}^{-1}} \\ {H_{2}=2945.7 \mathrm{kJ} \cdot \mathrm{kg}^{-1}} & {V_{2}=667.75 \mathrm{cm}^{3} \cdot \mathrm{g}^{-1}}\end{array}$$

What is the velocity of the steam at the nozzle exit, and what is the exit diameter?

An ideal gas initially at 600 K and 10 bar undergoes a four-step mechanically reversible cycle in a closed system. In step 12, pressure decreases isothermally to 3 bar; in step 23, pressure decreases at constant volume to 2 bar; in step 34, volume decreases at constant pressure; and in step 41, the gas returns adiabatically to its initial state. Take $C_P = (7/2)R$ and $C_V = (5/2)R.$ (a) Sketch the cycle on a PV diagram. (b) Determine (where unknown) both T and P for states 1, 2, 3, and 4. (c) Calculate Q, W, $\Delta U, \text { and } \Delta H$ for each step of the cycle.

In Fig. 7–26, calculate $I_1$, $I_2$, $I_\text{L}$, $V_\text{BG}$, and $V_\text{AG}$ with a. $S_1$ open. b. $S_1$ closed.

Carbon dioxide gas enters a water-cooled compressor at conditions $P_1 = 1$ bar and $T_1 = 10^\circ C,$ and is discharged at conditions $P_2 = 36$ bar and $T_2 = 90^\circ C.$ The entering $CO_2$ flows through a 10-cm-diameter pipe with an average velocity of $10 m \cdot s^{−1},$ and is discharged through a 3-cm-diameter pipe. The power supplied to the compressor is $12.5 kJ \cdot mol^{−1}.$ What is the heat-transfer rate from the compressor?

$$\begin{array}{ll}{H_{1}=21.71 \mathrm{kJ} \cdot \mathrm{mol}^{-1}} & {V_{1}=23.40 \mathrm{L} \cdot \mathrm{mol}^{-1}} \\ {H_{2}=23.78 \mathrm{kJ} \cdot \mathrm{mol}^{-1}} & {V_{2}=0.7587 \mathrm{L} \cdot \mathrm{mol}^{-1}}\end{array}$$