Numerade

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9. Comparing the two firms below, firm ______ has a high amount of financial leverage and firm ______ has a low amount of financial leverage. (2) a. A; A b. B; B c. A; B d. B; A | | A | B | |---------------|------|------| | Sales | 100 | 100 | | Variable costs| (50) | 0 | | Fixed costs | 0 | (50) | | EBIT | 50 | 50 | | Interest expense| 0 | (20) | | EBT | 50 | 30 | | Tax | (20) | (12) | | Net income | 30 | 18 |

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Goblet cells secrete mucus onto luminal surfaces. True False Goblet cells secrete mucus onto luminal surfaces. True False

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True/False: Refraction is the bending of a wave when it enters a different medium.

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Which of the following is not considered part of the “nature of the genetic code” that is important to the process of translation?

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What is the term for the psychological process of assigning meaning to a situation or event? a) Attribution b) Motivation c) Self-efficacy d) Reinforcement

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The following data are assessments of tuna quality. We compare the Hunter L measure of lightness (x) to the averages of consumer panel scores (y) (recoded as integer values from 1 to 6 and averaged over 80 such values) in 9 lots of canned tuna. (Hollander & Wolfe (1973), p. 187f.) Build a confidence interval for the slope parameter and use this interval to test the claim that the population slope is greater than zero at 5% significance. X: 44.4, 45.9, 41.9, 53.3, 44.7, 44.1, 50.7, 45.2, 60.1 Y: 2.6, 3.1, 2.5, 5.0, 3.6, 4.0, 5.2, 2.8, 3.8

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Consider the series $\sum_{n=1}^{\infty} (-1)^{n-1} \frac{3n^2}{n^2 + 1}$, which diverges. Which of the following statements best justifies the claim that this series diverges? This series diverges by the Alternating Series Test since $\lim_{n \to \infty} \frac{3n^2}{n^2 + 1} \neq 0$. This series diverges by the Integral Test since $\int_{1}^{\infty} \frac{3x^2}{x^2 + 1} dx = \infty$. This series diverges by the Limit Comparison Test since $\lim_{n \to \infty} \frac{3n^2}{n^2 + 1} = 3$. This series diverges by the Divergence Test since $\lim_{n \to \infty} (-1)^{n-1} \frac{3n^2}{n^2 + 1} \neq 0$. This series diverges by the Direct Comparison Test since $\frac{3n^2}{n^2 + 1} < 3$ for all $n$.

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Question 6 (16 points) Table 1 below presents market values and O&M costs for factory equipment. Hence, determine its economic lifetime. MARR of 10% Justify your answer. Table 3: Challenger Data Life EUAC (years) (S) 1 3,400 2 3,060 3 2,645 4 2,520 5 2,560 Table 2: Defender Cost Data Year Market Value ($) O&M Costs ($) 1 4,000 1,100 2 3,200 1,600 Table 1: Equipment Cost Data Year Market Value ($) O&M Costs ($) 0 45,000 30,000 1 20,000 9,000 2 25,000 12,000 3 Answers to Qu.5 (No points will be earned for answer spaces left blank. Full credit will be given only if all the necessary steps are clearly shown in the calculations and the answer is correct) A. a

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Question 5 For the Mohr circle below, how much is the maximum shear stress in 3D? $\tau_{\text{max}}$=6 ksi $\tau_{\text{max}}$=2 ksi $\tau_{\text{max}}$=4 ksi $\tau_{\text{max}}$=16 ksi

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2. A sphere of radius a carries a polarization \textbf{P} = \textbf{c}\textbf{r} where c is a constant and \textbf{r} is the position vector from the center. (There us no free charge in this problem). Calculate the electric field \textbf{E} at any point inside and outside the sphere by two methods: (a) Locate all the bound charge, and use Gauss's law $\oint \textbf{E} \cdot d\textbf{a} = Q_{encl}/\epsilon_0$ to compute the electric field it produces. (b) Use $\oint \textbf{D} \cdot d\textbf{a} = (Q_f)_{encl}$ to determine \textbf{D}, and then the relation \textbf{D} = \epsilon_0\textbf{E} + \textbf{P}.

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erik l.