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esther higgins

esther h.

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What I Have Learned 1. Which statement is NOT correct for an atom with an electron configuration of \( 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5} \) ? A. It has 17 electrons B. It has 3 main energy levels. C. The 3 p orbitals are completely field. D. The \( s \) orbitals are completely filled. 2. Which electron configuration below is correct? A. \( 1 s^{2} 2 s^{2} 2 p^{5} 3 s^{2} 3 p^{6} \) B. \( 1 \mathrm{~s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{3} \) C. \( 1 s^{2} 2 s^{2} 3 s^{2} 2 p^{6} 3 p^{4} \) D. \( 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{4} \) 3. Which is the correct configuration of \( P_{15} \) using the Hund's Rule. A. \( 1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{px}^{2} 2 \mathrm{py}^{2} 2 \mathrm{pz}^{2} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{2} 3 \mathrm{p}^{1} 3 \mathrm{p}_{\mathrm{z}} \) B. \( 1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{px}^{2} 2 \mathrm{py}^{2} 2 \mathrm{p}_{z^{2}}{ }^{2} 3 \mathrm{~s}^{2} 3 \mathrm{px}^{1} 3 \mathrm{py}^{1}{ }^{1} 3 \mathrm{p}_{z^{1}}{ }^{1} \) C. \( 1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{px}^{2} 2 \mathrm{py}^{2} 2 \mathrm{p}_{z^{2}} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{1} 3 \mathrm{p}^{1} 3 \mathrm{p}_{\mathrm{z}} 4 \mathrm{~s}^{1} \) D. \( 1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{px}^{2} 2 \mathrm{py}^{2} 2 \mathrm{p}_{z^{2}} 3 \mathrm{~s}^{2} 3 \mathrm{px}^{1} 3 \mathrm{py}_{\mathrm{y}} 3 \mathrm{p}_{\mathrm{z}^{1}} 4 \mathrm{~s}^{1} \) 4. Write the electron configuration of \( \mathrm{Ca}_{20} \) and show its orbital diagram. \begin{tabular}{|c|c|c|} \hline Elements & Orbital Diagram & Electron Configuration \\ \hline \( \mathrm{Ca}_{20} \) & & \\ & & \\ \hline \end{tabular}

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What age-related changes to the respiratory system explain why an elderly person may experience fatigue with exertion?

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Find the solution vectors u and v such that the solution space is the set of all linear combinations of the form su + tv. $x_1 - 3x_2 + x_3 - 16x_4 = 0$ $x_1 + 2x_2 + x_3 + 19x_4 = 0$ $x_1 + x_2 + x_3 + 12x_4 = 0$ The solution vectors are u = \boxed{} and v = \boxed{}, such that x = su + tv, $x_3 = s$ and $x_4 = t$, where s and t are real numbers.

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y-values 10 9 8 7 6 5 4 3 2 1 g(x) y-values 5 4 3 2 1 1 2 x-values 3 4 5 x-values If $f(x) = g(x)h(x)$, then use the graphs above to find $f(5)$. h(x)

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Public goods suffer from , which means that those who pay for the provision of public goods prevent others from using them. This makes private markets provide optimal amounts of public goods.

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Determine the location and value of the absolute extreme values of f on the given interval, if they exist.\\ $\frac{1}{20x^2} - x$ on $[0,400]$ f(x) = 20x$^2$ - x on [0,400] What is/are the absolute maximum/maxima of f on the given interval? Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. A. The absolute maximum/maxima is/are at x = (Use a comma to separate answers as needed.) B. There is no absolute maximum of f on the given interval.

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You have learned so far the suffixes -thome, -ectomy, and -stome. Explain the differences and meanings of the suffixes and illustrate them using examples of medical terms that are related to the digestive system.

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What early twentieth-century film does Byron Hurt describe as having "spread fear and paranoia about black masculinity"?

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4- (20 points): We need to analyze two flexible drive options to reduce the rotation of the input shaft from 1000 rpm to 400 rpm. The input power is 20 hp. The first option is using a belt. The second option is using a chain. We assume a safety factor of 1.15 and a service factor of 1.1 for both cases. a. Option 1 - Belt: If we have only Polyamide A-3 belts available with a width of 5 in. i. Calculate the maximum allowable tension on the belt. ii. Considering max allowable tension, how much initial tension should we have on this belt? iii. Check whether this system will have sufficient friction for operation. b. Option 2 - Chain: Assuming that our smaller sprocket has 18 teeth: i. How many teeth the larger sprocket should have? ii. Perform the necessary calculations and choose a chain number, strand number, and lubrication type. iii. How many pitches of this chain do we need?

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Find each of the following products. (a) \begin{bmatrix} 3 & 2 \end{bmatrix} \begin{bmatrix} 1 \ -1 \end{bmatrix} = (b) \begin{bmatrix} 3 & -1 & 1 \end{bmatrix} \begin{bmatrix} 2 \ 0 \ -2 \end{bmatrix} =

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