Complete the sentence in a way that shows you understand the meaning of the italicized vocabulary word. You should first $\mathit{hone}$ your skills if you plan to...

Choose the best answer. Which is an example of a population? (a) a family of bears living in an area of a national park (b) mammalian species inhabiting the area around a river (c) all red-eyed tree frogs living in a particular nature reserve (d) global sustainability would be achieved.

Use a graphing utility to determine whether the system of equations has one solution, two solutions, or no solution.

$$\left\{\begin{array}{l} {y=x^{2}+2 x-1} \\ {y=2 x+5} \end{array}\right.$$

Choose the best answer. If two atoms of an element are isotopes, then they have a different (a) number of protons. (b) number of neutrons. (c) number of electrons. (d) atomic number.

Use a graphing utility to determine whether the system of equations has one solution, two solutions, or no solution.

$$\left\{\begin{aligned} x^{2}+3 x+y &=4 \\ 3 x+y &=-5 \end{aligned}\right.$$

Given sin P = 11/28 and Q is a right angle, draw and label triangle PQR and find cos P and tan P.

Factor the expression

$$2x^2-20x+50$$

The spectral emissivity of an opaque surface at 1500 K is approximated as

$$\begin{matrix} \varepsilon_{1}=0 & for & \lambda<2 \mu m\\ \varepsilon_{2}=0.85 & for & 2 \leq \lambda \leq 6 \mu m\\ \varepsilon_{3}=0 & for & \lambda>6 \mu \mathrm{m}\\ \end{matrix}$$

Determine the total emissivity and the emissive flux of the- surface.

Find the nth term of a sequence suggested by the pattern. $2, \frac{3}{2}, \frac{4}{3}, \frac{5}{4}, \ldots$

The compressor in a refrigerator takes refrigerant R-134a in at 100 kPa, $-20^{\circ} \mathrm{C}$, and compresses it to 1 MPa, $40^{\circ} \mathrm{C}$. With the room at $20^{\circ} \mathrm{C}$ find the minimum compressor work.

What are the two methods used in radiation analysis? How do these two methods differ?

A 73-percent efficient 12-hp pump is pumping water from a lake to a nearby pool at a rate of $1.2 \mathrm{ft}^{3} / \mathrm{s}$ through a constant-diameter pipe. The free surface of the pool is 35 ft above that of the lake. Determine the irreversible head loss of the piping system, in ft, and the mechanical power used to overcome it.

Steam is to be condensed on the shell side of a 1-shell-pass and 8-tube-passes condenser, with 50 tubes in each pass at $90^{\circ} \mathrm{F}\left(h_{f g}=1043 \mathrm{Btu} / 1 \mathrm{bm}\right).$ Cooling water $\left(c_{p}=1.0 \mathrm{Btu} / \mathrm{lbm} \cdot^{\circ} \mathrm{F}\right)$ enters the tubes at $60^{\circ} \mathrm{F}$ and leaves at $73^{\circ} \mathrm{F}.$ The tubes are thin walled and have a diameter of 3/4 in and length of 5 ft per pass. If the overall heat transfer coefficient is $600 \mathrm{Btu} / \mathrm{h} \cdot \mathrm{ft}^{2} \cdot^{\circ} \mathrm{F},$ determine (a) the rate of heat transfer, (b) the rate of condensation of steam, and (c) the mass flow rate of cold water.

The condenser in a power plant cools 10 kg/s water at 10 kPa, quality 90%, so that it comes out as saturated liquid at 100 kPa. The cooling is done by ocean water coming in at ambient $15^{\circ} \mathrm{C}$ and returned to the ocean at $20^{\circ} \mathrm{C}$. Find the transfer out of the water and the transfer into the ocean water of both energy and exergy (4 terms).