On a separate sheet of paper, explain the following term by using it correctly in a sentence. fellahin

Choose the word or phrase that best answers the question. How can speed be defined? A) acceleration/time B) change in velocity/time C) distance/time D) displacement/time

Determine whether the arguments are valid or not. Premises: If you eat your beans, you may have dessert. You ate your beans. Conclusion: You may have dessert.

Identify each equation. If it is a parabola, give its vertex, focus, and directrix; if it is an ellipse, give its center, vertices, and foci; if it is a hyperbola, give its center, vertices, foci, and asymptotes. $3 y^{2}-x^{2}=9$

Calculate. $\int{\dfrac{\sqrt{x}}{\sqrt{x}-1}}dx$

Shell-and-tube heat exchangers with hundreds of tubes housed in a shell are commonly used in practice for heat transfer between two fluids. Such a heat exchanger used in an active solar hot-water system transfers heat from a water-antifreeze solution flowing through the shell and the solar collector to fresh water flowing through the tubes at an average temperature of $60^{\circ} \mathrm{C}$ at a rate of 15 L/s. The heat exchanger contains 80 brass tubes 1 cm in inner diameter and 1.5 m in length. Disregarding inlet, exit, and header losses, determine the pressure drop across a single tube and the pumping power required by the tube-side fluid of the heat exchanger. After operating a long time, 1-mm-thick scale builds up on the inner surfaces with an equivalent roughness of 0.4 mm. For the same pumping power input, determine the percent reduction in the flow rate of water through the tubes.

Why are there two specific heats for gases $C_p$ and $C_{\text{V}}$ , yet only one given for solid?

Graph each equation over the interval $[ 0,2 \pi ].$ $y = | \cos x |$

The letters r and $\theta$ represent polar coordinates. Write each equation using rectangular coordinates (x, y). $r^{2}=\cos \theta$

Briefly explain its connection to African history from 800 to 1500. 6.Songhai

Urn 1 contains 7 red and 3 white balls. Urn 2 contains 4 red and 5 white balls. A ball is drawn from urn 1 and placed in urn 2. Then a ball is drawn from urn 2. If the ball drawn from urn 2 is white, what is the probability that the ball drawn from urn 1 was white?

What effect does decreasing the constant term have on the graph of y=mx+b?

The parametric equations describe the motion of a particle. Find an equation of the curve along which the particle moves.

$$\begin{array} { l } { x = 3 \cos t } \\ { y = 3 \sin t } \end{array}$$

Suppose that Congress passes a massive tax cut during an election year even though inflation is very high. What actions might the Fed take in response? Explain your answer.