Decide which vocabulary word or related form best expresses the meaning of the italicized word or phrase in the sentence. On the answer line, write the letter of the correct choice.

Unhealthful chemical wastes have polluted many wells in the area. ______________

a. Salubrious b. Noxious c. Moribund d. unscathed

Calculate the energy stored in a $1\text{ nH}$ inductor if the current flowing through it is (a) $0\text{ mA}$. (b) $1\text{ mA}$. (c) $20\text{ A}$. (d) $5 \sin(6t) \text{ mA }, t > 0$.

For each of the following items, circle any letter that is incorrectly capitalized.

Example 1. Former Presidential Candidate H. Ross Perot

The Well-known H. G. Wells Novel

In a heating system, cold outdoor air at 7$^\circ{}$C flowing at a rate of 4 kg/min is mixed adiabatically with heated air at 70$^\circ{}$C flowing at a rate of 5 kg/min. The exit temperature of the mixture is (a) 34$^\circ{}$C (b) 39$^\circ{}$C (c) 42$^\circ{}$C (d) 57$^\circ{}$C (e) 70$^\circ{}$C

Two long, straight wires have currents flowing in them in the same direction as shown in the figure. The force between the wires is a) attractive. b) repulsive. c) Zero.

Compare the results obtained from the discussed equations for air at 1 atm and 300 K flowing across a cylinder maintained at $400 \mathrm{~K}$, with Reynolds numbers of 50,000 and 100,000 . What do you conclude from these results?

Liquid is pouring into a large vat. After t hours, there are 5t+$\sqrt{t}$ gallons in the vat. At what rate is the liquid flowing into the vat (in gallons per hour) when t=4?

Find the angle $\theta$ of the $10-\mathrm{mm}$-diameter pipe of Fig. in which water at $40^{\circ} \mathrm{C}$ is flowing with $\mathrm{Re}=1500$ such that no pressure drop occurs. Also, find the flow rate.

The compressor and turbine of a simple gas turbine each have isentropic efficiencies of $90 \%$. The compressor pressure ratio is 12. The minimum and maximum temperatures are $290 \mathrm{~K}$ and $1400 \mathrm{~K}$, respectively. On the basis of an air-standard analysis, compare the values of (a) the net work per unit mass of air flowing, in $\mathrm{kJ} / \mathrm{kg}$, (b) the heat rejected per unit mass of air flowing, in $\mathrm{kJ} / \mathrm{kg}$, and (c) the thermal efficiency to the same quantities estimated for an ideal cycle.

Select the word that matches the definition. Check your answers in a dictionary.

a flowing together, as in two streams

a. affluence

b. confluence

c. fluent

Water flowing through a garden hose of diameter 2.74 cm fills a 25.0-L bucket in 1.50 min. What is the speed of the water leaving the end of the hose?

Match the word below with its definition. Check your answer in a dictionary.

a flowing together, as in two streams

a. affluence

b. confluence

c. fluent

Three wells are located in an x, y plane at the following coordinates: well 1, (0,0); well 2, (100 m, 0); and well 3, (100 m, 100 m). The ground surface is level, and the distance from the surface to the water table for each well is as follows: well 1, 10 m; well 2, 10.2 m; well 3, 10.1 m. Sketch the well field and find the hydraulic gradient.

In the article “Occurrence and Distribution of Ammonium in Iowa Groundwater” ammonium concentrations (in mg/L) were measured at a large number of wells in the state of Iowa. These included five types of bedrock wells. The number of wells of each type, along with the mean and standard deviation of the concentrations in those wells, is presented in the following table.

$$\begin{matrix} \text{Well Type} & \text{Sample Size} & \text{Mean} & \text{Standard Deviation}\\ \text{Cretaceous} & \text{53} & \text{0.75} & \text{0.90}\\ \text{Mississippian} & \text{57} & \text{0.90} & \text{0.92}\\ \text{Devonian} & \text{66} & \text{0.68} & \text{1.03}\\ \text{Silurian} & \text{67} & \text{0.50} & \text{0.97}\\ \text{Cambrian–Ordovician} & \text{51} & \text{0.82} & \text{0.89}\\ \end{matrix}$$

Can you conclude that the mean concentration differs among the five types of wells?